 CONT: It was said in episode 4 in the ninth season that both Joey  and Phoebe never had relationships that lasted longer than a month.  However, Phoebe dated a cop called Gary for longer than a month, and  it is said in the earlier seasons that Joey had been with a girl  called Angela DelVeccio for three years. Other than that, of course,  there are countless more mistakes in this subject in the series.