NB it may be worth pointing out that widespread itself appears somewhat more associated with negatively evaluated things; the reusable link which could be used to show this is https://ske.li/widespread_adj. It looks like this:
This entry was created in response to a student writing:
Students can gain a substantial encounter with ‘authentic language’
The reusable link https://ske.li/substantial shows that encounter is not one of the nouns commonly modified by substantial. The link looks a bit like this:
This entry was created in response to a student writing:
an accurate analysis of …
The issue here is that adjectives describing analysis normally focus on how thorough it was rather than its accuracy. The reusable link is https://ske.li/detailed_analysis and looks like this:
It may also be helpful to focus on verbs which collocate with analysis in these contexts. The re-usable link is https://ske.li/make_analysis and it looks like this: