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

Q: Sentence: 'two bears swim in a blue pool of water'. Find frequency of the letter 'o'

A: 4
****
Q: Sentence: 'a number of small boats on a beach near an umbrella'. Find frequency of the letter 's'

A: 2
****
Q: Sentence: 'a glass vase with some flowers inside of it'. Find frequency of the letter 'o'

A:
3
****