Weekends are the days I get the fewest requests for bookings - whether booking in advance for it or attempting same day booking. Email and phone calls are almost non existent on Saturday and Sunday. The exception is the midnight to 4 am calls. I don't pick up my phone at all after 10, but the phones go crazy after people strike out at the club.
However, weekends are when most of the longer engagements will happen. Weekdays are mostly 1-2 hour meetings, and weekend meetings tend to be at least 4 hours, with most being 6 hours. They also tend to be booked at least a few days in advance.
My personal feeling is that most ladies like to take time for themselves, be it self care, family time, catching up with friends, spiritual activities etc. on the weekends.....just like the rest of the world.
When you find that a lady is busy or unavailable, it doesn't mean she is seeing clients. It could very well mean she is busy living her life, and therefore not available. Or she may be trying to squeeze you in between her personal plans, and therefore creating a more rushed feeling atmosphere.