Apart from one misstep about in the middle I think I did it. I managed to post two posts per day for two weeks. Challenge achieved. Phew. And they (the team) said I couldn't do it.
It didn't bring in any more visitors, so it sort of proved my point that the number of post we are doing is not going to bring in more visitors.
So . . . Back to the planning whiteboard on that then !!
And back to more like one post per day as well.