blue-gray vs greige

blue-gray

adj

Of a bluish grey color.

greige

adj

Of a colour between grey and beige.
Unfinished; not fully processed; neither bleached nor dyed.

noun

A colour between grey and beige, closely akin to taupe.

How often have the words blue-gray and greige occurred in a corpus of books? (source: Google Ngram Viewer )