Final answer:
El Niño and La Niña events do not occur on a regular schedule and are irregular climate patterns in the Pacific Ocean.
Step-by-step explanation:
El Niño and La Niña events do not occur on a regular schedule every two to seven years. They are irregular climate patterns that occur in the Pacific Ocean every few years and can last for several months to a few years. El Niño is characterized by warm ocean temperatures, while La Niña is characterized by cooler than normal ocean temperatures.
Learn more about El Niño and La Niña events