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You should provide more details - esp. (1) what exactly do you mean by a "word" and (2) what exactly do you mean by a "consonant letter". In English, the letters Y and W can be consonants or not depending on the context - see: https://en.wikipedia.org/wiki/Consonant#Letters

If you have a definite list of consonant letters, you can count the consonants in a text by =

Length ( Filter ( Upper ( text ) ; "BCDFGHJKLMNPQRSTVXZWY" ) )

 

Thank you. I am working with the Brown Corpus (first 5000 words. Have eliminated "w" and "y" that function as vowel sounds.

So it looks like your formula will do the job. Thank you very much.

It worked. Yippee. Thanks again. 

31 minutes ago, Heng said:

Have eliminated "w" and "y" that function as vowel sounds.

How exactly have you managed to do that?