Actually no specific time to tweet a day. I am using a laptop only for tweeter,my account always open. I see other friend's tweet,reply if necessary. But I am not addict for tweeting.
just connect your twitter account to RSS feed of your blog and forget about how many times you need to tweet
I am always trying at least one twit daily at my twitter account but sometimes 4 to 5 in day when some sudden change are visible in search algorithms because I am digital marketing guys.
I did this one time during a webinar and actually ended up winning a ticket to Hubspot's conference in Boston. So worth it.
It's depends. No specific amount. But I'll tweet more if I've more important informations need to share with my followers.
I usually tweet between 10 & 20 times a day. I usually post a link to my high hit pages each day, but at varying times so I connect with different users. The same with old posts that I'd written, i tweet an old post once a day at the same time, then then next week, change the time and repeat the 7 days previous old posts. e.g. Mon - 10am - old post 1 Tues - 10am - old post 2 and so on.. then Mon 1pm - old post 1 Tues 1pm old post 2 etc If you want more info let me me or check my latest blog post.
You can tweet three times a week for as long as it makes sense; you can tweet once a week for info that is closely related to your business.
im always tweeting daily from football to web development - to general news - a mixture of everything really.