About to be seperated for a long time?

Do not get a 2nd job, that is not fair to your daughter. Take her to the park...do activities that you can do with your daughter. As for him leaving...when he leaves and you both tell him good bye, then say "see you later!" instead of just bye. You could also get a calendar and circle the date that he's coming home...and mark out the day that you just finished...you could also do that with your daughter as well. It would help with any questions about when she gets to see him, because you would talk about every day when you get to see him.