Weeks to months. Usually breathing returns to normal or better within weeks to months, but complete healing takes a full year.
A few months. I usually recommend to my patients to go at least 4-6 weeks after a rhinoplasty before any vigourous exercise or strenuous activity. After that, most patients report that they fully feel mostly like themselves in about 2-3 months, but it may take 6 months to a year for the nose to feel "completely normal".
Rhinoplasty Recovery. Your early result will be evident after 3 months. Final results and feeling will appear over the course of 12–14 months, which is the time necessary for complete tissue softening. Areas of sensitivity or numbness will slowly resolve; the tip of the nose will feel stiff and this will improve over the first few months. https://pacificcenterplasticsurgery.com/procedures/face/nose-reshaping/.