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

Q: Sentence: 'a line of people on motorcycles on the road'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'a notebook and pen are left on a park bench'. Find frequency of the letter 'e'

A: 5
****
Q: Sentence: 'a biplane leaving a runway with trees below it'. Find frequency of the letter 't'

A:
3
****