The sculpture, using a mix of materials, shows Frost with a pained expression, a weight on his shoulder and holding a separate and broken narwhal tusk – with the piece unveiled to his family on the BBC One programme.
“I did love the idea of the separation with the tusk because I don’t want that to define me,” Frost told BBC Breakfast.
“It was an important incident, but I’ve done so many other things since then.
“It’s kind of the sculpture of me that I hide from everyone… I never let anyone know what I was going through.
“I don’t want other people to suffer through my suffering… it made me have to be honest,” he said of the sculpture.
He has suffered Post Traumatic Stress Disorder since the attack and said his memory and health had been badly affected.
Frost, who was attending the conference for work, tackled Khan with two ex-offenders – John Crilly, who used a fire extinguisher on the attacker, and Steven Gallant, who helped confront him until police arrived on London Bridge.