Correct prepositions and collocations in general do not come naturally to a non-native speaker. I had been using www.just-the-word.com to check for right combinations, until it went offline some time ago. Although it was occasionally glitchy, it generally recognised grammatical categories correctly; others liked it too. Now I use https://www.freecollocation.com/, which does not seem to be as good as "JTW".
Question. What are the best public online collocation resources and English corpus search engines?
I expected to find a near-complete list of most useful online resources, but to the best of my knowledge no one has attempted to compile such a list on ell.stackexchange.com. I saw people referring to various dictionaries and to Google Ngrams. The latter is good for historical statistics, but does not show excerpts for the context, as does Reverso or did the aforementioned JTW.