You shouldn't feel the need to delete infrequent words like this manually. The flashcards use the frequency to prioritize the useful words first, so provided y

You shouldn't feel the need to delete infrequent words like this manually. The flashcards use the frequency to prioritize the useful words first, so provided you have a large enough pool of translated words you will never see the really infrequent ones. (The exception is that if you star any word, it will be bumped to top priority) Agree it could be nice to show the frequency information in the word list somehow, but it needs to be subtle / hidden enough not to clutter the UI.