at random – English Grammar Profiler

In the English Vocabulary Profile, the adverbial phrase ‘at random’ is listed at C1 with the meaning:

chosen by chance

For example:

So we‘ll choose one at random then.

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A collocate search in the iWeb corpus:

1 CHOSEN 4713 2 SELECTED 4295 3 TIMES 2328 4 DRAWN 1694 5 PICKED 1493 6 PICK 1155 7 WINNER 1068 8 ENTRIES 999 9 INTERVALS 928

10 WINNERS 707