With the 21 Day Bonding Ritual Series,  you do not have to do it daily.  The rituals in it are designed to help you establish a communication foundation with your companion and learn to connect with them and work with them. You can do it every day, you can do it every second day, you can take a few days off, you can even repeat days.  In fact it is advisable to repeat days if you are having difficulty with the exercise you are working on. Repeating the exercises will actually help to strengthen them and help make your abilities stronger.
It is good to revisit the rituals of the 21 Day Bonding Ritual Series as well, or even pick your favourites and make them a part of your spiritual routing. They are meant to help you and act as a guideline but they is not set in stone, and if you miss a day it is no worries.  Just get back on when you can.
The exercises are there to help you, not add stress to your life. Work to figure out a schedule that works for you and don't worry if you miss a day. The skills can take time to develop and grow. Depending on where you are in your own spiritual growth it can also take time to build your communication foundation with your companions. When it comes to bonding with them, celebrate the wins, enjoy the process, be patient with yourself, and set up a schedule that brings you passion, not add to your stress.