covering vs pod

covering

noun
  • That which covers or conceals; a cover; something spread or laid over or wrapped about another. 

  • Action of the verb to cover. 

  • A continuous map onto a topological space X, 𝜋:E→X, such that there exists a discrete space D and for every x∈X an open neighborhood U⊂X, such that 𝜋⁻¹(U)= displaystyle bigsqcup _(d∈D)V_d and 𝜋|_(V_d):V_d→U is a homeomorphism for every d∈D. 

pod

noun
  • A small section of a larger office, compartmentalised for a specific purpose. 

  • A lie-flat business or first class seat. 

  • A small vehicle, especially used in emergency situations. 

  • A subsection of a prison, containing a number of inmates. 

  • A seed case for legumes (e.g. peas, beans, peppers); a seedpod. 

  • A group of whales, dolphins, seals, porpoises or hippopotami. 

  • A nicotine cartridge. 

verb
  • To swell or fill. 

  • To remove peas from their case. 

  • To put into a pod or to enter a pod. 

  • To bear or produce pods 

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