In this task, you need to count the number of times the given letter appears in the given sentence.

Q: Sentence: 'a woman is looking at sheep off in a field'. Find frequency of the letter 'm'

A: 1
****
Q: Sentence: 'a man in a sweatshirt is taking his own picture'. Find frequency of the letter 'u'

A: 1
****
Q: Sentence: 'a dog sitting on a window sill looking out of the window'. Find frequency of the letter 'i'

A:
6
****