manga vs political cartoon

manga

noun
  • A comic originating in Japan. 

  • A comic in manga style, regardless of the country of origin. 

  • An artistic style heavily used in, and associated with, Japanese comics, and that has also been adopted by a comparatively low number of comics from other countries. 

  • A covering for a crucifix. 

political cartoon

noun
  • Editorial cartoon. 

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