If you are looking for where repetitions of a word occur, there is some experimental code by Robert J.H. here that you could run in Effect > Nyquist Prompt… https://forum.audacityteam.org/t/need-pointers-on-adding-feature-to-search-pattern/33729/3 It finds sound occurring in the first 18000 samples elsewhere in the selection and removes other audio. It requires mono audio. It won’t work if the sound is mixed with different sounds in different places.
You could use Silence Finder or Sound Finder to label instances of the isolated word or words.
If you use it, don’t expect miracles and I expect it only works well for speech. It is looking for the same word based on intonation, so if the word is intoned differently elsewhere it won’t be found.
Gale