From grapho; a writing, i.e. A letter, note, epistle, book, etc.; plural learning -- bill, learning, letter, scripture, writing, written.
see GREEK grapho
γράμμα (gramma) − 1 Occurrence
γράμμασιν (grammasin) − 3 Occurrences
γράμματα (grammata) − 6 Occurrences
γράμματι (grammati) − 1 Occurrence
γράμματος (grammatos) − 3 Occurrences