here some backstory on the suggestion:

Lately i had a lioness that was almost too old to breed, but on a breeding cooldown. The text displayed said "in 8 real life days" i would be able to breed her again.
I proceeded not to rollover my account for 8 days thinking that it was indeed 8 real life days of waiting. Turns out, it really meant '8 rollovers' which ended up in quite a dissapointment and a loss of precious time.

And thus:
I suggest changing the text

from
'this lioness is on a breeding cooldown and will be breedable again in X real life days'

To
'This lioness is on a breeding cooldown and will be breedable again in X rollovers'

This idea is to prevent this misunderstanding from happening to other members of the Lioden community, because its just so unpleasant when you realized you wasted your time.
Another good point is that it is a small change and wouldnt be too impactful otherwise.

Let me know what you think of this