"She's thinking 'I wish my dad was here, why isn't my dad here?'. It's pretty unfair on her."
Mrs McMillan tells her story as a Weekend Herald investigation reveals the most dangerous industries to work in - and some of the most dangerous businesses to work for.
Twenty-one companies have been through the courts more than once in the past five years over serious health and safety breaches that have left workers injured or dead.
Unions are shocked at the figures as the Government wrestles with reforms to make working life safer.
Forestry - which claimed Mr Frater's life - remains by far the most dangerous occupation.
For Skyla, birthdays and Christmases are the hardest times.
"He's missed out on so much - her first day of school, all the little things like when she had ballet," Mrs Mcmillan said.
Each year, for his birthday and the anniversary of his death, the mother and daughter go to the park and let off helium balloons with messages on them.
The company Mr Frater worked for, C & R Logging, which has since been dissolved, was not prosecuted.
"I'm pretty annoyed," Ms McMillan said. "There were things that could have been done."
Mrs McMillan, 28, a home-based childcare worker, is backing an inquiry into forestry safety being planned by forest owners and contractors and the Council of Trade Unions.
Labour Minister Simon Bridges has rejected the need for a government inquiry, saying the new workplace safety rules and a new code of practice will make a difference.
Mrs McMillan met Mr Bridges yesterday to share her thoughts on why an inquiry is needed.
"The code of practice doesn't come close to what an inquiry would do," she said.
"It doesn't look at the hours of work these men do or the conditions that they're working in."
Mr Frater's death came as the industry thought it was getting on top of safety issues but a surge in fatalities and serious injuries in the past 19 months has shattered hopes.
Last month, after the sixth death in seven months, the Ministry of Business, Innovation and Employment told the industry to lift its game.
This week, the ministry began a crackdown on safety breaches at forestry logging sites. Inspectors will visit 330 contracting operations.
Health and safety operations manager Ona de Rooy said: "Where they see imminent danger, they are instructed to immediately close the operation down. The time for talk is over."Additional reporting: Geoff Cumming