a tad vs lip-smacking

a tad

adv

  • Very. 

  • A lot. 

  • To a small extent; in a small amount. 

  • Slightly; rather. 

lip-smacking

adv

  • Very. 

noun

  • The act of smacking one's lips 

adj

  • Tasty; appetizing. 

How often have the words a tad and lip-smacking occurred in a corpus of books? (source: Google Ngram Viewer )