How often does your mother-in-law visit you in your home?

My MIL is based in Japan and was able to have vacation in PH for 3 times in 4 years time. Last time was on March of this year. The past 2 visits, she was able to drop-by our house and had chit-chats with my mom and dad. We also got the chance to go out for lunch. She promised to come back by October and bring her Japanese family with her and said we shall spend a short vacation out of town. I'm happy with this set-up, btw. Lesser eyes to look upon us, lesser trouble. LOL.