Google Ngram Viewer

Heres a fun little plaything:
https://books.google.com/ngrams/graph?content=Tiki&year_start=1800&year_end=2000&corpus=15&smoothing=3&share=&direct_url=t1%3B%2CTiki%3B%2Cc0

Looks like tiki had a couple spikes there. I can see a correlation with the release of Kon Tiki, but the cause for some of the other spikes eludes me.

Polynesia is a another fun one to search.