Most hiring managers will consider more than two jobs in the past five years to be frequent movement. Take some time to explain your career progression to the interviewer. Be sure to avoid speaking poorly of any of your previous employers. This question is not the time to ramble on about how your former company did you wrong. Short and sweet is most appropriate here.
"Leaving Company X was due to a merger, and my role eliminated. Company Y was a seasonal role, and I am now looking for a new position because my contract with Company Z is complete this March."
"In my career, I have made moves to advance in my field of expertise. I am looking for a company that I can grow with long-term, and contribute value to, for many years to come."
"I have had a couple of unexpected moves in the last few years. You will see that my tenure, before the latest two positions, was solid. Company ABC went bankrupt shortly after I joined. Unfortunately, they did not disclose to me that they were in financial trouble before I joined their organization. Most recently, with Company XYZ, they decided to move their headquarters to Texas, and I am not able to relocate my family."
"The last two positions on my resume were internships and not long-term positions. The role before that was to get me through school. I am now looking for a full-time role related to my new Marketing degree."
"I wish that I would have vetted my last two companies a bit better before joining them. One offered a very toxic environment which is why I left after just three months. The other went into receivership and closed their doors."
"I am seeking a position where sales targets come from facts and not just a whim! I have unfortunately joined a couple of startups and the first year's goals were simply not realistic or achievable. This frustration has led me to believe that my skills are better suited for a larger organization with historical numbers and results to rely on."
"I have relocated a few times, as my husband is a soldier and his posts have changed frequently. He will be working in this area for the next 5-8 years, and I look forward to enjoying long-term employment."