Usage History of 'photogeology'

The following chart shows how frequently 'photogeology' appeared in printed materials over time. For example, the word 'photogeology' occurred 10 times in books in 1921 and 20 times in 2008. From 1921 to 2008, the word 'photogeology' was used a total of 7,433 times in books scanned by Google. See Reference: Google Ngram project.

See also:

Find all anagrams of 'photogeology'
Words starting with a,b,c...
Words ending with a,b,c...
Words starting & ending with a,b,c....