This question already has an answer here:
I'm writing you as I would like to receive some information about entering in the US under the VMP.I'm an Italian citizen, living and working in Italy, and I entered in the US on December 26th and June 4th, which stays lasted 88 and 87 days, respectively, for both business and vacation purposes.
I searched for detailed information regarding how many days I am allowed to spend in the US under the VWP program - apart of 90 days per stay -, as well as what can be considered a reasonable amount of time between visits, without any luck.
Since I am planning to visit a friend of mine in the US for 9 days, may I ask you if it would be allowed or if there is any constraint that might prevent me to enter in the US? Would it be too risky?
Edit: My question is slightly different than the older one because I'm concerned about entering in the US after two ~90 days stays in one year.