I wonder which preposition goes best with help in these phrases:
... people who ** could help **:
- in these topics
- on these topics
... people who ** could offer help**
- in these topics
- on these topics
I was typing a thank you comment in this post: Into and out of 'time out' for kids, but I felt I lost my bearings on which preposition to use; and when I quickly looked up on Google I didn't find immediate results. Google Ngram was not of much help.
I might get it right if I took a break and came back later but I thought I'd ask to test my guess and for future reference anyway- I guess phrases that pull up help/in/topic together sound familiar; and I'd venture a guess that the pattern offer help on these topics is the correct one.
