This is just a fun factoid to entertain you.
By now you should know not to put too much stock in Google Ngrams result graphs, and insist on a deep dive into the individual results. I thought I'd share a new kind of weirdness I encountered.
I had been curious as to which of the various spellings of McGuffin (referring to the plot device) was more common. My initial search yielded many results from the 19th Century.
I settled on this search, utilizing the definite article to eliminate persons named McGuffin or whatever. There were still 19th- and early 20th Century results! One was a Theodore McGuffin (abbreviated as The.) but even weirder things showed their heads.
Apparently, Google's OCR algorithm does not know how to recognize books printed with multiple columns on one page. So, in a two-word Ngram, you can get a result if one word in one column is near the other word in the other column, purely by coincidence: