Is it 'pronunciation' or 'pronounciation'?

We’ve received quite a few letters and emails from correspondents asking for pronunciation help—but in some of these letters and emails, pronunciation is spelled pronounciation. The confusion is understandable: the verb is pronounce, so why shouldn’t the noun be pronounciation? Both the noun and verb come ultimately from the Latin verb pronuntiare. But when the Latin verb was taken into Anglo-French and later entered Middle English, that second vowel was sometimes rendered as -u- and sometimes rendered as -ou-. This meant that, from about the 1500s onward, we have evidence of both pronounciation and pronunciation in the written record. Eventually the noun standardized to pronunciation, but because of influence from pronounce, we do occasionally see pronounciation in print, and we also have evidence of a corresponding pronunciation for pronounciation (\pruh-nown-see-AY-shun\). The spelling pronounciation and the pronunciation that goes with that spelling are not considered a part of standard English. Using them could result in criticism or questioning.