Incidence

According to this figure, the reflection angle equals the incidence angle.

The incidence of people travelling on fake or stolen passports is not as rare as people would like to think.

The incidence of OCD is greatest among teens and young adults.

This may contribute to the rising incidence of HIV in the over-50 age group.

As a result of the riots, the incidence of looting in wealthy neighborhoods increased.

Excuse me, sir, but is this an incidence of road rage?

It's very hard to understand concepts like prevalence, incidence, and case fatality ratio, but some articles explain these very well.

The angle of incidence equals the angle of reflection.

In a study published in the journal The Lancet Oncology, researchers with the International Agency for Research on Cancer in Lyon, France, reported the incidence of childhood cancer was 140 per million per year from 2001–2010 among children up to age 14.

The International Osteoporosis Foundation projects that the global incidence of hip fracture will double by 2025, and nearly triple by 2050, when it will affect more than 6 million people.