For a longer term perspective check google's Ngram which analyzes all digitized material.
Interstingly the term 'cold fusion' actually goes back to the 1700s. The early references show that it was used to identify a particular metalsmithing process. http://books.google.com/ngrams/graph?content=cold+fusion&year_start=1750&year_end=2000&corpus=0&smoothing=3 Harry
