[bluGill]

There are two variables, time and cleaning standards. People clean to a higher standard with modern tools in general (in general, but not in all specifics).

My grandma took a bath/shower once a week - she grew up when a bath meant bringing water in from outside by hand, heating it on a fire, and then you had to bring it back outside to dump it - I sometimes shower twice a day, and I still use less effort over a week to get clean than my grandma did back in the day.