tetrach 1,2 mundana ...

http://lila-erc.eu/data/lexicalResources/NLW/id/attestation/3558 <http://www.w3.org/nl/lemon/frac#Attestation>

tetrach 1,2 mundana ... 
tetrach 1,2 mundana musica, quae de harmonia totius et partium mundi, tam supercelestis quam elementaris considerat. ] 

data from the linked data cloud