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

Q: Sentence: 'a dog laying on the back of a boat in the water'. Find frequency of the letter 't'

A: 4
****
Q: Sentence: 'a view from a bathroom shows an open door'. Find frequency of the letter 'o'

A: 7
****
Q: Sentence: 'a bear runs through the verdant woods'. Find frequency of the letter 'r'

A:
4
****