Some bonuses are distributed quarterly, others yearly. Some are a one-time thing, others are recurring. It all depends on what role you're in, what level you're at, what you contribute, what your leadership is like, and what kind of company you work for (among many other things).
A year-end bonus is a form of compensation that employers pay to their employees in addition to their regular earnings. This type of bonus is often tied to performance metrics. Bonuses can be made in cash as lump-sum payments or in other forms, such as stocks or paid time off.