This can be exemplified using the clusters soberize/sober, and fossilize/fossil: soberize is recorded neither in the BNC nor in the COCA, in contrast to sober, which has a normalized frequency of 1.52 in the BNC and 1.32 in the COCA.
(16) The subparadigm for soberize is a case of an impoverished set as it does not contain forms derived by affixes other than -ed and -ing.
sober ensober V 1651 1651 CAUSATIVE sober V 1797 - CAUSATIVE sobered Adj V 1820 - PROCESS soberer N sobering Adj sobering N unsober V soberize V 1707 - CAUSATIVE soberized Adj soberizing Adj V 1831 1831 PROCESS Base Attested Sem.cat.