ganj vs hashish

ganj

noun
  • ganja. 

  • A market. 

hashish

noun
  • Marijuana generally. 

  • A cannabis extract. 

  • The leaves and tender parts of the Indian hemp plant (which are intoxicating), which are dried for either chewing or smoking. 

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