lark vs morning person

lark

noun
  • One who wakes early; one who is up with the larks. 

  • Any of various similar-appearing birds, but usually ground-living, such as the meadowlark and titlark. 

  • A romp, frolic, some fun. 

  • A prank. 

  • Any of various small, singing passerine birds of the family Alaudidae. 

verb
  • To catch larks (type of bird). 

  • To sport, engage in harmless pranking. 

  • To frolic, engage in carefree adventure. 

morning person

noun
  • A person who wakes up, without difficulty, early each morning and is alert and active during the first part of the day. 

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