Y vs p

Y

character
  • Used for the Greek letter Υ (Y, “upsilon”). 

  • The twenty-fifth letter of the English alphabet, called wye and written in the Latin script. 

noun
  • A figure or mark in the shape of the letter Y. 

  • A particular facility run by the YMCA/YWCA. 

  • A Y-shaped object, such as a railroad fork or a support for a telescope; a wye, a bifurcation. 

  • A moth of the genus Plusia, having markings resembling the letter Y. 

p

character
  • The sixteenth letter of the English alphabet, called pee and written in the Latin script. 

noun
  • proton 

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