How much time did medieval Christians devote to prayer?

I was critiqued [on this answer](https://christianity.stackexchange.com/questions/11675/christian-view-of-why-there-are-so-many-similarities-between-quran-and-bible) concerning it taking less time out of the day for someone to be a Muslim than a Christian, and that may be untrue for a majority of Christians today. But how much time did an Christians between the 600's and the 1200's spend in prayer each day? Were there novenas, rosaries, the divine office, the angelus, chaplets etc... back then and if so how did they come to be fairly ubiquitous? How would anyone even begin to research what kinds of devotions one's own ancestors may have practiced?