Original: Ibid , Table 142 , p. 499 , and p. 474 Marital coitus The average frequency of marital sex reported by women was 2.8 times a week , in late teens ; 2.2 times a week , by age 30 ; and 1.0 times a week , by age 50 .
Simplified: How often they have sex : Women reported to have had sex 2.8 times a week ( in the late teens ) , 2.2 times a week by age 30 , and once a week by age 50 .