We all wash our clothes to hold ourselves and our clothes smelling so fresh and oh-so-clean,but there is such a thing as too much washing and too little. There are downsides to both extremes: laundering your clothes more than you need to can shorten their lifespan and wear them out quickly, but washing too rarely can be unhygienic and cause a lot of icky bacteria growth. Here's a general guide to follow:
Bras: After three to four wears.
Underwear: After every wear.
Socks and stockings: After every wear.
Sportswear and swimwear: After every wear.
Jeans: Five to six wears. Although there are some that advocate washing as little as possible. In fact, or the director of brand concepts and special projects for Levi Strauss & Co. washes his once every six months.
Tops: One to two wears.
Dresses: One to two wears.
Leggings: One to two wears.
Pants,skirts, and shorts: Three to four wears.
Jackets and blazers: Five to six wears.
Coats: Once every two months of wear.
PJs: Three to four wears.
Of course, or this guide doesn't apply to the days when excessive sweating or accidental spills happen,and to those who occupy different hygiene preferences.
Source: popsugar.com