Month names collection / metastudy

[eggyk]

How are you finding these, by the way? Does BNF have OCR for its manuscripts as well?

Searching terms on Gallica within quotation marks does provide OCR results, yes. However, the vast majority of the available OCR content is from printed material; most of the older manuscripts have no OCR unfortunately. I assume they only thought it worthwhile to scan the material with clear lettering. 

As for the hypercorrection, there might be overlaps here. If enough people overcorrected, say, at the beginning of the 14th century, perhaps that overcorrection eventually became so common that it became an accepted written and spoken variant for a time. So what we're saying might be compatible.

And yes, I assume that the later octembres were indeed typesetting mistakes. Most are oc- *linebreak* -tembre, which is probably telling.