Can i say this sentence, is this sentence grammatically correct. can i add it in my essay?

the sentence is:

after 4 years, a coincidence no one ever thought would happen, happened.

Read the passage below and answer the question. jake was incredibly loquacious. he once gave a twenty minute monologue about his favorite movie. in the passage above, the context clue used to find the definition of loquacious is an example of an antonym an example a synonym the tone of the whole phrase