Seeing as I have still been unable to prove that the man's work froc was worn/used in nouvelle France, perhaps I should have titled this post "Un French Froc". I guess these posts are to prove that the froc/frock did indeed exist in France, and that what one sees in paintings is NOT an undershirt being worn as outerwear, as has been suggested to me. So here are some more images. Some are 17th century, others 19th century, but I think we can safely assume that if they existed in these two time periods, then they also existed in the 18th century.
By Le Nain. 17th century.
19th century engraving of a French peasant. Note the wooden clogs.
French peasants 1859. By Hermogenes Calderon .
By one of the Le Nain brothers, 17th century.
French peasants dancing outside an inn. By David Tenniers 1649.
Detail from the above painting.