When you ask a question you're going to get the advice people feel is pertinent. If that's not quite what you're looking for in an answer, by all means, reply back with more details but if this isn't a yes/no field and there's often far more useful material in the comments surrounding the explanation... especially when you think of something like SEO which has been built up into this massive list of rules that don't always translate to actual reality, or benefits.
Remember, other posters don't know what your background is or expertise level is and thus may not write exactly to it. </lecture>
As for your question, I don't know that there's a definitive answer here... Either way you're making frequent enough updates that Google, Bing, Yahoo, etc are going to keep up their indexing and notice the changes.
If you were for example blogging a couple times a day vs one dump of 20 posts a week AND getting lots of chatter to those topics the engines would have a reason keep on top of things more often and potentially attach you trending topics, but that doesn't sound like what you're talking about. I can't see how you'd get any serious benefit over two days of one page or one day of two pages. Things just don't tend to be that granular at that low of a volume.