doilem vs dummkopf

doilem

noun

  • A stupid person, an idiot, a fool, a halfwit or Mund. 

dummkopf

noun

  • A stupid person; a dolt, dimwit, or blockhead. 

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