lank vs thin as a wafer

lank

adj

  • Slender or thin; not well filled out; not plump; shrunken; lean. 

  • Straight and flat; thin and limp. (Often associated with being greasy.) 

verb

  • To become lank. 

thin as a wafer

adj

  • Extremely thin. 

How often have the words lank and thin as a wafer occurred in a corpus of books? (source: Google Ngram Viewer )