ordo vs series

ordo

noun
  • A category in the classification of organisms, ranking below classis and above familia. 

  • A calendar which prescribes the Mass and office which is to be celebrated each day. 

  • A musical phrase constructed from one or more statements of one modal pattern and ending in a rest. 

  • an established civil body or corporation with a hierarchy 

series

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

  • 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. 

  • A parcel of rough diamonds of assorted qualities. 

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

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

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