Knitting...

"According to a commonly used measure, to produce a master carpenter or a musician it takes 10,000 hours of experience. Several studies show that,as the craftsman progresses, his ability improves
its tuning with the problem ... In its upper levels, the technique is no longer a mechanical activity; it can be fully felt while doing it and deeply thought when it is well done."

Richard Sennet, The Craftsman (El artesano)

...just need about 9.997 hours to be masters in knitting...