knitwear vs swaddling clothes

knitwear

noun
  • knitted garments 

swaddling clothes

noun
  • A garment, made of strips of cloth, used to bind an infant and restrict movement of its limbs. 

  • An early period in development, infancy, the beginnings of something; inception. 

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