I love Michelle’s post. We personally like the multiple stream history and have been using it for at least 2 years now. However, I think you should choose what best works for your family. A four or six year cycle may be what works best for you!
Here’s what we are doing. We are using a typical 4 year program (BiblioPlan). I’m skipping the guide that covers ancient history, leaving us with 3 Biblioplan guides to cover over 4 years. We are using Memoria Press’s classical studies to cover our ancient history. Since there are some literary elements to it, I’m scheduling this during our literature time slot 1-2 days per week. We cover BiblioPlan 2-3 days per week during our history time slot (it alternates with science). The third stream (Biblical history) is covered in the evenings. We read a chapter of the Bible each night and a church history or theological book on Sunday evenings in place of our devotion.
Using the SCM guides, you could divide the guides into the Delectable Education timeline schedule. Or you could cover guides 1-3 over four years and guides 4-6 over the same four years. Or you could save yourself some grief figuring it out and use it as written over 6 years! lol
The beauty of homeschooling is that it is up to you!