leer vs side-eye

leer

noun
  • A significant side glance; a glance expressive of some passion, as malignity, amorousness, etc.; a sly or lecherous look. 

  • The flank or loin. 

  • An arch or affected glance or cast of countenance. 

verb
  • To look sideways or obliquely; now especially with sexual desire or malicious intent. 

  • To entice with a leer or leers. 

side-eye

noun
  • A sidelong look, particularly of animosity, judgment, or suspicion. 

verb
  • To look at out of the corner of one's eye, particularly with animosity, or in a judgmental or suspicious manner. 

How often have the words leer and side-eye occurred in a corpus of books? (source: Google Ngram Viewer )