Gherkin vs Smoke

Gherkin

name

  • The building at 30 St Mary Axe, a distinctively-shaped skyscraper in London, England 

Smoke

name

  • London. 

  • The 44th sura (chapter) of the Qur'an. 

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