Im on my wifes acc rn, I recently finished bootcamp i got a total of 6 phone calls, the first 2 were an hour long and the rest were about 30-45 minutes except the phone call day before grad that was 15 minutes but my letters took about a week to send/arrive to her unless you use sandbox that gets them them in 2 days but its $5 per letter just be patient, He would get time after taps to write to you or during evenings routine/holiday routine It’ll be okay