amigo vs pal

amigo

noun
  • A friend. 

  • Mexican. 

  • A native of the Philippines who was friendly toward the Spanish. 

pal

noun
  • A friend, buddy, mate, cobber; someone to hang around with. 

  • An informal term of address, often used ironically in a hostile way. 

verb
  • Be friends with, hang around with. 

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