@Pui ****
Listen. Thai IO can't state how many entry you can get in a year by air. Due to my experience i wrote at the bottom of this post, they couldnt answer that question, just now it is not allowed more than 2 entry by land by years or 180 days by years. At first this limit was mainly enforced from Thai embassy and consulate in Europe where you could be in trouble when asking another TR visa after had spend 6 months in Thailand. By exemple, Thai embassy in Paris was strict about it and we even suspect them to communicate some informations to the French Authorities (tax purposes and other stuff). Also of course more paperwork. Also moving to Paris was a big pain in the ass just for that visa. So most of people moved to Thailand without visa then apply for an extension or a visa in a neightbor country. And the 180 days rules in ASEAN embassies wasn't much enforced, and their IT system wasn't well connected prior to 2017, im not gonna elaborate on this... But i have seen many friends cases proving that. But right now they do enforce the 180 days rules and seem to have set an Alert in their system since the pandemic ended.