Okay, so since @Tez and @TNP asked…
(I will try to keep it short, but blame them.)
#1 - Considering it was the supposed Dark Ages, the Norse were surprisingly clean. We know this not just from artifacts found at archaeological digs, but from writings of others during the time period. Thank John of Wallingford for this particular quote:
“The Danes, thanks to their habit to comb their hair every day, to bathe every Saturday, to change their garments often, and set off their persons by many such frivolous devices. In this manner, they laid siege to the virtue of the married women, and persuaded the daughters even of the nobles to be their concubines.”
We also have grave findings of ear spoons, which were used to clean wax from inside the ears, and kept on chatelaines along with their version tweezers and other grooming items. Some evidence exists that stereotypes of the Norse as blonde relates to use of lye products in their hair. Lighter hair was considered attractive in Norse society, so the lye was used for bleaching, but it also has the added side benefit of killing lice. So this isn’t the modern equivalent of showering every day, but compared to the stereotype we have of Vikings, they were actually pretty clean.
#2 - While we don’t know how often the Tudors bathed, we do know that they had some pretty fancy recipes for both baths and scented soaps of various kinds. Full on baths were highly discouraged because open pores were obviously how infection entered the body, but a daily morning scrub with linen clothes was actively recommended, and we have the writings to prove it. Linen was also used for undergarments (which does a great job of absorbing moisture off the skin) and changed out to be washed regularly. A modern historian has followed guides to Tudor hygiene practices twice as part of a personal experiment, and you can read her thoughts about the practice.