depends on how often you are with them/ communicate with them and the quality of that time.
theres people who work crazy hours x days on, x days off
people whos job requires lots of travel
military and govt employees who deploy
so it really depends on the parent.
i also think its better for a child to have 2 happy parents in 2 different households whom are able to work together for the child
than 2 miserable ass parents who hate eachother under the same roof with a poison atmosphere