Su vs Sunday

Su

name
  • A diminutive of the female given name Susan and of its variant forms. 

  • A Chinese surname from Mandarin. 

Sunday

adv
  • On Sundays. 

noun
  • A comic strip published in a Sunday newspaper. 

  • The first day of the week in many religious traditions, and the seventh day of the week in systems using the ISO 8601 standard; the Christian Sabbath; the Lord's Day; it follows Saturday and precedes Monday. 

  • A newspaper published on Sunday. 

verb
  • To spend Sunday (at a certain place, with a certain person or people, etc.). 

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