def count_sentence_splits(complex_sentence, simple_sentence): return safe_division(count_sentences(simple_sentence), count_sentences(complex_sentence))
def count_characters_per_sentence(sentence): return safe_division(count_characters(sentence), count_sentences(sentence))
def count_syllables_per_sentence(sentence): return safe_division(count_syllables_in_sentence(sentence), count_sentences(sentence))
def count_words_per_sentence(sentence): return safe_division(count_words(sentence), count_sentences(sentence))