Druid wildshape ability

[Milicent Malakov]

I've been reading posts for the last hour and I still haven't found an answer to my question which is:

Is the druids wildshape ability = 1hr per level per use of the wild shape ability or just 1 hour per level per day?

As I was looking at this I was seeing a 10th level druid with 4 wildshape uses a day being an animal all day.

[jjaamm]

1 hour/lexel per use is what ive always seen