How long does it take to clean the Sylphy throttle?

How long does it take to clean 09 Sylphy throttle? The following is my personal opinion:

09 Sylphy throttle is generally cleaned once every 20,000 to 40,000 kilometers. Throttle is a controllable valve that controls air to enter the engine. There are two kinds of 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. It is connected with the air filter and the engine block, and is called the throat of the automobile engine. Sylphy is a car series launched by Dongfeng Nissan Passenger Car Company on 1959. The length, width and height of the car are 464 1mm, 18 15mm and 1447mm respectively, and the wheelbase is 2712 mm. In terms of power, the model of Sylphy is HR1.6L.