"When you feel so mad that you want to roar, take a breath and count to four." - Daniel Tiger's mom

I've found breathing exercises to be effective for the duration of the exercise, but I'm more interested in the possibility of training myself to adjust my respiration patterns over sustained durations. Would it be beneficial -- or even possible at all -- to adjust my body's default/subconscious breathing patterns to match those mentioned in the article?

Tangentially related, are there any wearable devices that allow for high resolution respiration monitoring? I'm imagining some measurement of lung expansion over time (probably at least 10 Hz) so that I can quantify the deepness/shallowness of my breaths as well as the phase of inhalation/exhalation cycles.