How often does the accelerator of Volkswagen clean?

The following is about "How often does Volkswagen's throttle clean?" Related introduction:

Volkswagen's throttle is cleaned every 20,000 kilometers. Throttle is a controllable valve that controls air to enter the engine. There are two kinds: traditional cable throttle and electronic throttle. After the gas enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be burned to do work. Volkswagen's automobile brands are: Tan Yue, Santana, Santana Hao Na, Volkswagen Polo and LaVida Pure Electric. Take Tan Yue as an example: the length, width and height of Tan Yue are 4589mm, 1860mm and 1660mm respectively, the wheelbase is 273 1mm, the body type is 5-door 5-seat SUV, and the gearbox is 7-speed dual clutch.