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

Q: Sentence: 'a small white plane sitting on top of the ocean'. Find frequency of the letter 'e'

A: 4
****
Q: Sentence: 'people fishing and enlarge mountainlake with trees lining the shoreline'. Find frequency of the letter 't'

A: 4
****
Q: Sentence: 'a man riding skis across snow covered ground'. Find frequency of the letter 'u'

A:
1
****