Usage History of 'pterins'

The following chart shows how frequently 'pterins' appeared in printed materials over time. For example, the word 'pterins' occurred 2 times in books in 1728 and 163 times in 2008. From 1728 to 2008, the word 'pterins' was used a total of 14,951 times in books scanned by Google. See Reference: Google Ngram project.

See also:

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