[math-fun] The other kind of codimension

If W is a subspace of V, is there a name for dim V / dim W? And more generally for the ratio of the dimensions of two things, one of which sits inside the other? (This question is inspired by my misrecollection of the nature of knotting in higher dimensions, which is the same as Cris Moore‘s: we both recalled that 2 was involved, but we thought it was relevant as an approximate ratio, rather than as a difference!) I could defend the term “codegree”, but I’m hoping someone else already coined an obscure but uncontroversial word for dimension-ratios. Jim Propp