If you are to consider the full 25% given to the curators and voters as a whole, thus a 100%, the author gets everything on the moment of the posting including  the comments reward if one is able to comment within the very first minute. From there, that 25% is going to be parted progressively with all the people voting and commenting on the post. 

This progression goes from 0% on the moment of the posting progressively on a constantly rate to 50% at 15 minutes and thus all the way to the 30 minutes mark where 100% of the comments rewards goes to the commentator. 

That specific 100% is on the reward you get if anyone upvotes your comment or if you do it for yourself deeming you comment is helping the platform being more sustainable.

Thus, the 25% of rewards returned to the voters and commentators starts being distributed in constant increments from 1 sec. till 30 minutes later, then it is all bunched into one pot and divided 7 days later as one big pot.  I hope this might be a bit clearer?!? I cross my fingers, namaste    :)