Explanation:

- The phrase "Person living at the same time" refers to someone who shares the same period or era in history with another individual.

- Option 1: Contemporary - This is the correct substitute as it means someone living during the same time period as another.

- Option 2: Coquette - This refers to a woman who flirts lightheartedly with men to win their admiration.

- Option 3: Cosmopolitan - This denotes someone who is worldly, familiar with different cultures and countries.

- Option 4: Connoisseur - This is a person who is especially competent to pass critical judgments in an art, particularly fine arts.