Wouldn't worry too much about it. Work changes from month to month.
And in our job, supply and demand is key.

I personally get busy no matter what month it is, but I think it is because I appeal to wide range of clients. If you market yourself well and appeal to a large age range, you will find that you get alot more work. Think about what different types of people you would be ok to meet would want, then go from there. Also double check your prices against other girls. Too high and people will go elsewhere, too low and people may think you're desperate. So it's good to find a nice price that works for what area you are in.

Where are you based and how long have you been there
Sometimes an area goes dead if you have been there  a long time  you have used up the hardcore punter base and maybe not enough passing traffic to keep you busy if that makes sense
    But what’s  busy for one would be dead for another escort and the same in reverse

I've been in Gateshead for about 4 years now. I did take a 6month break at some point though. The market isn't super saturated here, so that most likely helps with keeping me busy also to be fair. I would guess places like London have alot more girls flooding the market. I've never toured, so can't comment on other areas.

I too agree with the age and race thing, I do mainly offer GFE but that can include quite a range. For clients I get to know/aren't pushy but know what they want, know what's involved I do venture into foot fetish, edging, wrestle play, role play and providing corporal punishment. I've also gone into medical fetishes and a few other things - always with care and those who've researched ie it's not a pie in the sky list.