“A few hours earlier” VS. From a few hours earlier

Question

In the book, Friend Zone

“And she was a thousand times better than the drop-dead gorgeous yoga instructor from a few hours earlier.”

What is “from” adding to the context here?

Well, I mean if “from” was omitted, would the meaning change?

“And she was a thousand times better than the drop-dead gorgeous yoga instructor a few hours earlier.”

Answer 1

From is telling that the teacher was FROM the time period that was few hours earlier.

The second sentence is missing the preposition (from), and is not telling the relation between the teacher and the time. Hence it is grammatically wrong.