alimony vs child support

alimony

noun
  • A court-mandated allowance made to a former spouse by a divorced or legally separated person. 

  • The means to support life. 

child support

noun
  • The ongoing obligation for a periodic payment made directly or indirectly by an obligor, usually the noncustodial parent, to an obligee, usually the custodial parent or other guardian, for the financial care and support of children of a relationship or marriage that has been terminated, or which never existed. 

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