aftercare vs preservation

aftercare

noun
  • The care given to a patient during recovery from an operation or after hospitalization. 

  • Tender affection and care given to a partner after a BDSM activity, usually to serve as a transition between the activity and whatever follows it. 

  • Services and support offered to a customer for the goods or service they have purchased. 

  • Childcare services tending to children after the school day. 

  • Emotional support offered by the programme makers to a person who has appeared on a stressful talk show, etc. 

preservation

noun
  • The act of preserving; care to preserve; act of keeping from destruction, decay or any ill. 

  • The state of being preserved, how something has survived. 

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