humdinger vs lulu

humdinger

noun
  • Something that is particularly outstanding, unusual, or exceptional. 

lulu

noun
  • A remarkable person, object or idea. 

  • A very bad mistake or error. 

  • A very attractive or alluring person. 

  • A fixed allowance paid to a legislator in lieu of reimbursement for actual expenses. 

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