| Undecided: Abbr. | 16 |
| Undecided, on a TV schedule | 27 |
| Undecided, in some listings (abbr.) | 35 |
| TV-sked placeholder | 19 |
| TV-schedule abbr. | 17 |
| TV sked letters | 15 |
| TV schedule placeholder | 23 |
| TV schedule inits. | 18 |
| TV schedule abbreviation | 24 |
| TV listing abbreviation | 23 |
| TV Guide's "We don't know yet" | 48 |
| TV Guide listing | 19 |
| TV abbreviation | 15 |
| Time slot abbr. | 15 |
| Television listings abbreviation | 32 |
| Sked note where a cancellation happened, maybe | 46 |
| Sked notation | 13 |
| Sked abbreviation | 17 |
| Service-station line: Abbr. | 27 |
| Scheduling placeholder | 22 |
| Schedule-slot abbr. | 19 |
| Schedule uncertainty (Abbr.) | 28 |
| Schedule slot letters | 21 |
| Schedule ref. | 13 |
| Schedule maker's abbr. | 26 |
| Sched. unknown | 14 |
| Sched. uncertainty letters | 26 |
| Sched. spaceholder | 18 |
| Sched. slot that's open | 27 |
| Sched. slot notation | 20 |
| Sched. gap letters | 18 |
| Sched. ambiguity | 16 |
| Sched. "question mark" | 32 |
| Sched. notation | 16 |
| Question mark on a TV sched. | 28 |
| Program guide abbr. | 19 |
| Placeholder on a sched. | 23 |
| Placeholder listings abbr. | 26 |
| Placeholder letter on schedules | 31 |
| Placeholder in a bracket | 24 |
| Pending letters | 15 |
| Not yet posted, on a sched. | 27 |
| Not yet on the sked | 19 |
| Not yet nailed down, for short | 30 |
| Not yet known, on a TV schedule | 31 |
| Not yet filled, on a sched. | 27 |
| Not yet filled, in a sched. | 27 |
| Not yet determined: Abbr. | 25 |
| Not yet decided (abbr.) | 23 |
| Not yet decided on a sched. | 28 |
| Not on the TV sched. yet | 24 |
| More info later: Abbr. | 22 |
| Listings abbr. | 14 |
| Letters of uncertainty | 22 |
| Letters of indecision, on a schedule | 36 |
| Letters in an open slot | 23 |
| Letters for an open schedule slot | 33 |
| Letters for a gap in the schedule | 33 |
| Letters denoting "date not set" | 41 |
| Inits. indicating unfinished business | 37 |
| Info. forthcoming | 17 |
| Info to come later | 18 |
| Info to come | 12 |
| Info pending | 12 |
| Info is yet to come | 19 |
| Inf. to come | 12 |
| Forthcoming: abbr. | 18 |
| Details will follow | 19 |
| Course-catalogue abbr. | 22 |
| Cast-list abbr. | 15 |
| Awaiting scheduling: Abbr. | 26 |
| Awaiting scheduling, in brief | 29 |
| As yet unscheduled, briefly | 27 |
| Abbr. in TV listings | 20 |
| [We'll tell you later]: Abbr. | 33 |
| [We'll let you know]: Abbr. | 31 |
| [We don't know who's opening the show, but trust us, they're going to be AWESOME, we hope] | 102 |
| [Check later] | 13 |
| [Check back later]: Abbr. | 25 |
| [Check back later] | 18 |
| "We'll tell you later," in a program (abbr.) | 58 |
| "We'll tell you later," briefly | 45 |
| "We'll get back to you on that" letters | 53 |
| "We don't know yet," on skeds | 43 |
| "We don't know who's playing" | 47 |
| "Watch this spot" | 27 |
| "Watch this space" letters | 36 |
| "Watch this space," for short | 39 |
| "Unknown," on a sked | 30 |
| "Schedule uncertain at press time" abbr. | 50 |
| "More later," on a sched. | 35 |
| "Info forthcoming," for short | 39 |
| "I'm not sure yet," on a schedule | 47 |
| "Don't know yet," on a schedule | 45 |
| "Details forthcoming": Abbr. | 38 |
| "Check later" letters | 31 |
| "Check back later" in listings | 40 |
| "Ask me later" on a schedule | 38 |
| ''Unknown,'' on a sched. | 40 |
| ''Still open,'' on a sched. | 43 |