General questions
1,2,3

1. Are the Winter OIympics held twice a year?

2. Did they take place there last time?

3. Do many countries take part?

1. Are the Winter OIympics held every four years?  

Yes, they are. The Winter Olympics are held once in four years.  

2. Did they take place in Pyeong Chang in Korea last time?  Yes, they did. They took place in Pyeong Chang in 2018.

3. Did many countries take part in them?     Yes, sportsmen from 92 countries took part in those Winter Olympic games.

( Ninety-two countries took part in Winter Olympic games of 2018 in Korea in Pyeong Chang.)