https://books.google.com/ngrams/graph?content=hardcore%2Clove&year_start=1800&year_end=2013&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Chardcore%3B%2Cc0%3B.

https://books.google.com/ngrams/graph?content=hardcore%2Clove&year_start=1800&year_end=2013&corpus=15&smoothing=3&share=&direct_url=t1%3B%2Chardcore%3B%2Cc0%3B.t1%3B%2Clove%3B%2Cc0 https://books.google.com/ngrams/graph?content=hardcore%2Clov... Not the same dataset though...