TOO VAGUE to answer.
Are you talking enlisted basic training? 8 weeks at Lackland in San Antonio, not but one weekend during training and at graduation
Are you talking enlisted tech schools? Depends on school and their rules
Are you talking OTS at Maxwell? Probably about the same as at enlisted basic.
Are you talking flight school after getting a commission? All the time at night after a 12 hour day in the flight room, if you take the spouse with you. If you leave the spouse at home because they have a good job, then you will see the spouse whenever they come to see you on weekends or after those 12 hour days in the flight room.