Pinterest pins really last longer than any other social share. Have you ever checked out a referral from your Google analytics to find it was a pin from months ago or even more than a year? Would that ever happen via a month old tweet or Facebook post?
The average Facebook post lasts 3 hours. That’s it! Of course it depends on the algorithm and how many followers or fans you may have at that time. A good rule of thumb is not to post more than 1x every 3 hours. You can now use the auto scheduling right on Facebook or use the The Buffer or Hootsuite. There are many tools out there for scheduling your social media posts.