| Text | Length |
| Once-a-decade event | 19 |
| Once, quaintly | 14 |
| Once, perhaps | 13 |
| Once, once upon a time | 22 |
| Once, once | 10 |
| Once, old-style | 15 |
| Once, old style | 15 |
| Once, of old | 12 |
| Once, maybe | 11 |
| Once, long ago | 14 |
| Once, it meant "once" | 31 |
| Once, in the past | 17 |
| Once, in Scotland | 17 |
| Once, in old times | 18 |
| Once, in former times | 21 |
| Once, in Dundee | 15 |
| Once, in days past | 18 |
| Once, formerly | 14 |
| Once, but not twice | 19 |
| Once, but not nowadays | 22 |
| Once, at one time | 17 |
| Once, archaically | 17 |
| Once, a long time ago | 21 |
| Once's partner | 18 |
| Once _____ while | 16 |
| Once ____ blue moon | 19 |
| Once ____ a time . . . | 22 |
| Once ____ twice shy | 20 |
| Once ___ while | 14 |
| Once ___ time | 13 |
| Once ___ lightly | 16 |
| Once ___ lifetime | 17 |
| Once ___ blue moon | 18 |
| Once ___ a time | 15 |
| Once ___ | 8 |
| Once __ while | 13 |
| Once __ time ... | 16 |
| Once __ blue moon | 17 |
| Once __ a time | 14 |
| Once __ (every seven days) | 26 |
| Once worked as | 14 |
| Once was involved in | 20 |
| Once was | 8 |
| Once upon ___ | 13 |
| Once upon a time | 16 |
| Once upon -- | 12 |
| Once surnamed | 13 |
| Once removed | 12 |
| Once powerful city-state of ancient Greece | 42 |
| Once possessed | 14 |
| Once popular player | 19 |
| Once popular coiffure | 21 |
| Once per annum | 14 |
| Once owned | 10 |
| Once over lightly | 17 |
| Once Ontario Premier | 20 |
| Once named | 10 |
| Once more: Abbr. | 16 |
| Once more, Western style | 24 |
| Once more, to Dizzy Dean | 24 |
| Once more, in the Ozarks | 24 |
| Once more, in Latin | 19 |
| Once more, in Dogpatch | 22 |
| Once more, in dialect | 21 |
| Once more, hillbilly-style | 26 |
| Once more, Dogpatch-style | 25 |
| Once more, country-style | 24 |
| Once more, colloquially | 23 |
| Once more than two times | 24 |
| Once more than once | 19 |
| Once more or no more | 20 |
| Once more in the country? | 25 |
| Once more from the top | 22 |
| Once more to Lil Abner | 23 |
| Once more | 9 |
| Once minus tres | 15 |
| Once menos ocho | 15 |
| Once lived | 10 |
| Once known as, in society pages | 31 |
| Once known as | 13 |
| Once kept | 9 |
| Once it was enough | 18 |
| Once in ___ moon | 16 |
| Once in a while (with "now") | 38 |
| Once in a while | 15 |
| Once in a long while | 20 |
| Once in a great while | 21 |
| Once in a blue __ | 17 |
| Once in a blue moon, old-style | 30 |
| Once in a blue moon | 19 |
| Once in --- moon | 16 |
| Once follower | 13 |
| Once existed | 12 |
| Once every 365 days | 19 |
| Once every 24 months | 20 |
| Once every 12 months | 20 |
| Once doubled | 12 |
| Once did | 8 |
| Once called, in wedding notices | 31 |
| Once called | 11 |
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