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

Q: Sentence: 'a bus with two floors belonging to london country'. Find frequency of the letter 't'

A: 4
****
Q: Sentence: 'a yellow and green train on a train track in a wooded area'. Find frequency of the letter 'o'

A: 4
****
Q: Sentence: 'a giraffes head popping out of a red telephone booth'. Find frequency of the letter 'g'

A:
2
****