There is really no answer, and it is a fine line between just enough and too much. I think the biggest thing to do is understand what type of personality she is and how it can mesh with your personality. For example, if she is a very needy person, it would probably be difficult to talk to her too much. However, if she is an independent and busy person, it would be best to not go overboard.
Most of the time, early in the relationship is the honeymoon stage, so you will probably talk more often at first. But keep it cool or you could wind up scaring her off.
Good luck.
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