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

Q: Sentence: 'a lady mixes some things in a blender as people look on'. Find frequency of the letter 'i'

A: 3
****
Q: Sentence: 'two people wearing snowboards sitting on a snowy slope'. Find frequency of the letter 's'

A: 5
****
Q: Sentence: 'a skateboarder is trying to do a trick'. Find frequency of the letter 'o'

A:
3
****