Ideally we would like the option where it is a button on the first donate page -- like this one -- you see you can just click the button then do monthly/quarterly/yearly:
Response updated on October 14, 2017.
We are currently seeking US-based customers who are interested in testing a new page type that allows this. If you are interested in participating, please sign up for user testing, select "Fundraising," and note that you want to test the new page.
For now, if you create a second donation page as a subpage of your primary donation page and allow recurring donations on the second page, a button linking to that page will automatically appear at the top of the primary donation page as can be seen below: