laundry list vs little black book

laundry list

noun
  • An unrealistic list of skills, qualifications and experiences, as demanded by employers when hiring staff. Similarly, an equally unrealistic skill set claimed by a candidate on a résumé. 

  • A long and often tedious list of items. 

little black book

noun
  • An address book, especially one in which the details of one's lovers are recorded 

How often have the words laundry list and little black book occurred in a corpus of books? (source: Google Ngram Viewer )