[…] the analogical formations are based not merely upon an ideal juxtaposition of words, but upon an actual one. To this degree we can conceive of them as a higher order of assimilations. Not infrequently, on the other hand, phenomena in which no conceptual relationships are at play can be traced back to ideal juxtapositions. Then we can speak of a lower order of analogical formations. Thus the frequency of certain sound complexes favors the new formation of identical ones or the frequency of a certain sound change brings about development into full generality. (p. 45)
- Schuchardt (1972)