How many times does an average person wash their hands?

You touch your face/head up to 2-4 times a minute, it may not seem like it but it does happen. That's up to 5,500 times a day but NO evidence has been found that supports this claim other than other undocumented claims on the internet which are likely linked to the movie "Contagion" when Kate Winslet's character states this as a fact.