How can I re-add deleted sites to my "Frequently Visited" sites again?

[iMore Question]

Sorry if this question sounds stupid but it means a lot to me. I mistakingly deleted youtube along with others from my "Frequently Visited" sites from Safari on IOS9. These are my most frequently visited sites. How can I re-add them to my "Frequently Visited" sites again?

 

[Just_Me_D]

Visit those sites