Answer
This is a matter of mutual agreement. Both the husband and wife need to be accommodating towards each other. The husband should not refuse permission to his wife unnecessarily nor should the wife be unfair in her wanting to go more than required.
This will also differ from situation to situation. The parents of the girl may be old age and have nobody else to tend to them, then in this case the wife should be allowed to visit her parents more regularly.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai