If your questions means if she rides him everyday, the answer is no. Sometimes it's the riders from Cian O Connor's stable who is ridding, or even Cian sometimes as she is between Europe and the US for her studies.
I don't remember if it is still the case but she was studying in Harvard last year and Cian's stable were in Frankfurt in Germany so she couldn't ride him all the time.
I hope it answered your question, if not you can DM me here or instagram at www.instagram.com/cyrinecherif_equestrianblog
You might also like this article I've wrote about the things I've learned when I've worked at Cian's stables last summer.