I have a lot of fun with the saying “a horse apiece.” It is commonly used in the northern 2/3 of Wisconsin and the Upper Peninsula of Michigan yet unknown in adjacent Minnesota, except perhaps on the iron range in NE Minn. I know 2 people from NE Minnesota who say it. A lot of culture like food was carried from iron mines in the UP of Michigan and northern Wisconsin to the iron mines in NE Minnesota so there may be a link there. Or they just learned it from Wisconsinites like I did (we all work together).
The occurrence of “a horse apiece” in the Upper Midwest is pretty much defined by the Wisconsin state line on the west. People on the Wisconsin side of the St Croix River use the expression every day, while people a mile away on the Minnesota side have never even heard the expression (and there is an interstate and short bridge connecting the 2 areas!).
4 anecdotes:
I recently started to work a lot with northern Wisconsinites and UP-ers so now hear the saying often. The first time I heard it I thought people were saying: “a horse of peace.”
I have asked many people from Madison in southern Wisconsin if they know the expression– and universally I get a blank stare and claims that “no one in Wisconsin says that.”
I have asked three people from the UP of Michigan and they all say “a horse apiece” (as well as use the verb “pank” and say “eh” just like Canadians but those are other issues!).
I also mentioned the saying once at a party in Minnesota, and a 70 year old man perked up and said that people in Minnesota used to say it, but that he never hears it anymore.