Azerbaijani vs Azerbaijani language

Azerbaijani

name

  • The language of Azerbaijan. 

adj

  • Of, from, or pertaining to Azerbaijan, the Azerbaijani people or the Azerbaijani language. 

noun

  • A person from Azerbaijan or of Azerbaijani descent. 

Azerbaijani language

How often have the words Azerbaijani and Azerbaijani language occurred in a corpus of books? (source: Google Ngram Viewer )