1. the act of demanding something forcefully or repeatedly; firm persistence in a demand or request
2. the quality of being emphatic or unwavering about something

Examples

• Her insistence on punctuality made everyone arrive on time.
• Despite his insistence that he was innocent, the jury found him guilty.
• The teacher’s insistence on proper grammar improved the students’ writing.
• At her mother’s insistence, she wore a coat to school.
• His insistence on doing everything himself slowed down the project.
• The company changed its policy due to customer insistence on better service.