How to count the number of letters in each row using r?

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猫巷女王i
猫巷女王i 2020-11-27 11:43

I want to count how many specific letters occur in each row.

countedAA <- data.frame (c(\'A count\',\'C count\',\'D count\',\'E
    count\',\'F count\',\'G         


        
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