When the admissions committees at LBS and INSEAD read your application, they will pay specific attention to the number of months you’ve spent at each role and company. So if you have been jumping around a lot, this might raise a red flag. 

While there is no specific definition of “too many jobs,” if you graduated five years ago and have already been working for four or five companies, that will seem like a lot.  Kellogg or Wharton might feel that you are unable to manage politics or build relationships, or that there’s something problematic about your professional background.
In a perfect world, you would have been promoted multiple times at one organization, and every job switch would mean that you have increased responsibilities, compensation and impact. Since this is not always the case, you have to clarify the situation to the admissions committee and help them understand your motivation for leaving each role and joining new companies.
Get objective feedback on how the Admissions committee will evaluate your work experience. Email yael@admit1mba.com and include your resume and target schools.