The girls were talking with Pete about covered wagon trains during the westward expansion of the U.S.
Pete: "Sometimes they traveled for SIX MONTHS on those wagons!"
Dorothy Jo (age 4.5): "Six months! Whoa! How many Masses is dat?"
Madeleine (age 7): "It's much longer than a Mass, Dorothy. Six months is when Mom's belly starts to get really poofed out when she's pregnant."
Mass and Pregnancy. How long something takes is compared to the length of the holy sacrifice of the Mass or the stage of a pregnancy.
Makes sense. That's pretty much what we know around here.