I write almost every day, but I still can find it hard to keep up with all my commitments. I have really 4 blogs and while I cross post where appropriate, it's still a lot to do.
One of the things I think is important in building your brand online is that you need to show you're making regular progress. You show that you are constantly improving at whatever rate makes sense for you, but that you are making progress in your career.
Blogging is a great way to do this, but it requires that you regularly post. It can be weekly, bi-weekly or monthly instead of daily. The important thing is that you actually try and get the posts out there on a fairly regular basis.
There's nothing worse than searching for someone's blog, seeing they posted twice a day for 3 weeks, than 2 more times over the next six months and nothing in the last 2. It shows me a bit of immaturity, a lack of follow through, and the tendency to jump on some bandwagon and then drop out.
I could be way off, but this would definitely raise flags for me in an interview. I usually want people that commit to something and can maintain it. That shows the type of effort that I'd like to see in a hire. I think lots of companies would have a similar feel.
Pick a schedule and stick to it. You would be best to get ahead of the game and schedule posts out for the future rather than publish every time you write something. That way you have a pipeline of content that you can use in case you get busy and can't write.