peculiarity vs quirk

peculiarity

noun
  • That which is peculiar; a special and distinctive characteristic or habit; particularity. 

  • Exclusive possession or right. 

  • The quality or state of being peculiar; individuality; singularity. 

quirk

noun
  • An idiosyncrasy; a slight glitch, mannerism; something unusual about the manner or style of something or someone. 

  • An acute angle dividing a molding; a groove that runs lengthwise between the upper part of a moulding and a soffit. 

verb
  • To (cause to) move with a wry jerk. 

  • To furnish with a quirk or channel. 

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