series vs sluice box

series

noun
  • A parcel of rough diamonds of assorted qualities. 

  • A set of consonants that share a particular phonetic or phonological feature. 

  • A television or radio program which consists of several episodes that are broadcast in regular intervals 

  • A number of things that follow on one after the other or are connected one after the other. 

  • An unranked taxon. 

  • The sequence of partial sums ∑ᵢ₌₁ⁿa_i of a given sequence aᵢ. 

  • A subdivision of a genus, a taxonomic rank below that of section (and subsection) but above that of species. 

  • A group of matches between two sides, with the aim being to win more matches than the opposition. 

sluice box

noun
  • A box with riffles along the bottom, used to trap heavier gold particles as water washes them and the other material along the box. 

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