"He has arrived at seven every day to work in the field."
Translation:Ele tem chegado às sete todos os dias para trabalhar no campo.
"Cada dia" is like focusing each day one by one. It doesn't work very well for this sentence, unless you really want to focus that individual days, one by one idea....it fits better sentences where each day has something new, like "a cada dia ele chega mais tarde" (he is getting later and later every day).
"Todo dia" is simply every day.