aunt-in-law vs sib

aunt-in-law

noun
  • The wife of one's uncle or aunt (parent's sibling). 

  • The aunt of one's husband. 

  • The aunt of one's wife. 

sib

noun
  • A sibling, brother or sister (irrespective of gender) 

  • A group of individuals unilaterally descended from a single (real or postulated) common ancestor 

  • Any group of animals or plants sharing a corresponding genetic relation 

  • A kinsman; a blood relation; a relative, near or remote; one closely allied to another; an intimate companion. 

  • Kindred; kin; kinsmen; a body of persons related by blood in any degree. 

adj
  • Having kinship or relationship; related by same-bloodedness; having affinity; being akin; kindred. 

verb
  • To bring into relation; establish a relationship between; make friendly; reconcile. 

  • To engage in repetitive behaviors such as eye-poking, skin-picking, hand-biting, or head-banging. 

How often have the words aunt-in-law and sib occurred in a corpus of books? (source: Google Ngram Viewer )