Big one is upvotes I guess? Or not… It correlates only sometimes. The small one I have absolutely no idea.
Edit: Thanks everyone for answering! The big one is upvote rating and the second one is time. Regarding no letters: My guess is - it doesn’t show “m” or “h” near the time because my system is not in english, and though most of the lemmy is in english, for some reason the time on a post renders only “sometimes” in my system language or doesn’t render at all.
Big number: net upvotes = upvotes - downvotes
Little number: time since the post or comment was created. Some comments have another time number in parentheses, which tells you when the comment was last edited.
Upvote and downvote tallies seem to vary depending on which instance you’re using and how well things are syncing.