I posted the first ngram search incorrectly. Ngram is case sensitive unless you check the box on the right. Plus, I think I should not have put "cold fusion" in quotes. I am not sure how the quote sign works in ngram.
Here is a new search comparing LENR (all caps) to "cold fusion" (no quotes): https://books.google.com/ngrams/graph?content=LENR%2C+cold+fusion&year_start=1980&year_end=2008&corpus=15&smoothing=3&share=&direct_url=t1%3B%2CLENR%3B%2Cc0%3B.t1%3B%2Ccold%20fusion%3B%2Cc0 "Cold fusion" is much more popular. Putting "cold fusion" in quotes makes them about equal. I do not know what that means. https://books.google.com/ngrams/graph?content=LENR%2C+%22cold+fusion%22&year_start=1980&year_end=2008&corpus=15&smoothing=3&share=&direct_url=t1%3B%2CLENR%3B%2Cc0%3B.t1%3B%2C%22%20cold%20fusion%20%22%3B%2Cc0 The 19th century word was "lenr" (lower case). I do not know what it meant.
