It's a managers' graveyard. Look at Conte,just won the Italian League with Napoli, kicked ahrt of Spurs. Pochetino kicked ahrt for not winning a trophy, Ange kicked ahrt after winning the first trophy for 17 years and getting them into the so-called champions league. Frank is either brave or mad.
I reckon he'll be back at Brentford within 2 years, but only if they choose a new gaffer now who doesn't work out for them. If I was a manager I know which Club I'd prefer to look after.