improper vs wanty

improper

adj
  • unsuitable to needs or circumstances; inappropriate; inapt 

  • Not properly named; See, for example, improper fraction 

  • Not in keeping with conventional mores or good manners; indecent or immodest 

  • Not consistent with established facts; incorrect 

  • Of a complex random variable, correlated with its conjugate 

  • Not according to facts; inaccurate or erroneous 

wanty

adj
  • Possessing or indicating lack; deficient. 

noun
  • A stretch of fishing-lines shot in the water. 

  • A girth or belly-band for a horse's harness. 

  • A surcingle, or strap of leather, used for binding a load upon the back of an animal. 

  • A leather tie; a short wagon rope. 

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