forlet vs pack in

forlet

verb
  • To abandon; give up; leave; leave behind; forsake; desert; neglect. 

  • To forget. 

pack in

verb
  • To give up, to quit. 

  • To include (especially of a large amount). 

  • To transport to base camp, especially by backpack. 

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