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

[Q]: Sentence: 'a snowboarder making a jump of a snowy ledge'. Find frequency of the letter 'o'
[A]: 4


[Q]: Sentence: 'two little girls playing with a bat and a tennis ball'. Find frequency of the letter 'w'
[A]: 2


[Q]: Sentence: 'an older man waving at the edge of a baseball diamond, near another man at a podium'. Find frequency of the letter 'n'
[A]:
7