Sometimes I want to find something, like an image that I have shared previously (for ease of reuse but also to reduce the load on the servers to not have to store it multiple times), and so I'll want to search comments (not posts) by sth like Top Month or Top Week, but ofc cannot:-(. So instead like a chump I just go through them one by one until I find what I wanted... It's annoying to visually see those options provided, yet they do not function as you would expect. So indeed, they need to do a lot of work on the search functions:-).

But this is a thought for the interim:-).