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

Q: Sentence: 'a person working at an airport, outside of an airplane'. Find frequency of the letter 'r'

A: 5
****
Q: Sentence: 'a woman at a table checking her cell phone'. Find frequency of the letter 'a'

A: 5
****
Q: Sentence: 'an open toilet seat in the middle of a bathroom with a leaf motif on the side'. Find frequency of the letter 'a'

A:
6
****