The actor explained that a neighbour from his childhood was among the people who influenced his performances as the Weatherfield butcher, who died on screen in October 2006.
Speaking on This Morning in an interview to mark Corrie's 50th anniversary, Savident said of Fred's mannerisms: "I based them on people I knew. We had a gentleman who lived down the road from us, and I don't think he liked children.
"Suddenly, the door would open and he'd say, 'I saw that, I say, I saw that!' or 'Get off them roses, I say, get off them roses!'. Of course, we were nowhere near them! It used to mystify me, but of course later on it came in handy."
The 72-year-old also paid tribute to his former screen son Steven Arnold (Ashley Peacock), saying that working with him was "wonderful".
Discussing the twist which saw Fred revealed as Ashley's father and not his uncle as originally thought, he said: "The relationship between uncle and nephew was so strong. I could be totally wrong, but I have a feeling that it gave them the idea to make Ashley Fred's son. I was absolutely delighted. The relationship between the two was so much fun to do."
Savident played the role of Fred for 12 years.