aftercare vs conservation

aftercare

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

  • 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. 

  • Childcare services tending to children after the school day. 

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

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

conservation

noun
  • Wise use of natural resources. 

  • The discipline concerned with protection of biodiversity, the environment, and natural resources 

  • The protection and care of cultural heritage, including artwork and architecture, as well as historical and archaeological artifacts 

  • The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation. 

  • Genes and associated characteristics of biological organisms that are unchanged by evolution, for example similar or identical nucleic acid sequences or proteins in different species descended from a common ancestor 

  • lack of change in a measurable property of an isolated physical system (conservation of energy, mass, momentum, electric charge, subatomic particles, and fundamental symmetries) 

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