Certainly somewhere inbetween for me as well ā if I understand the whole page save for one-two words, it makes sense to add that to a deck personally, feels easy filling a gap like that. If a sentence/sequence makes me feel lost, I just try to get the gist of it and move on.
This works out to 20-30 words mined / session (1-1,5 hours), which is perfect personally for growing my mining deck.
Whatever floats your boat, really, but itās important to keep it fun for yourself. Itās always fine to switch media too, if itās too easy, too hard or just straight up boring, and maybe come back to it later. A half-read book still made you learn a lot, no reason to finish it if you donāt want to.