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

Q: Sentence: 'a small white dog looking out a car window'. Find frequency of the letter 'l'

A: 3
****
Q: Sentence: 'a woman walking on a shore next to a river'. Find frequency of the letter 'v'

A: 1
****
Q: Sentence: 'a group of skiers going down a snow covered hill next to the ski lift'. Find frequency of the letter 'i'

A:
5
****