convection vs removal

convection

noun
  • The vertical movement of heat and moisture, especially by updrafts and downdrafts in an unstable air mass. The terms convection and thunderstorm are often used interchangeably, although thunderstorms are only one form of convection. Towering cumulus clouds are visible forms of convection. 

  • The transmission of heat in a fluid by the circulation of currents. 

removal

noun
  • The relocation of a business etc. 

  • Murder. 

  • An evening funeral ritual in which the coffin holding the deceased is brought, usually from a funeral home, to the church where the funeral mass will be celebrated the following day. Prayers are said before and after the journey, after which mourners are typically received at the home of the deceased. 

  • The process of removing, or the fact of being removed. 

  • The dismissal of someone from office. 

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