How to create a weight loss chart<br>Weigh yourself regularly. Studies have shown that weighing yourself on a daily basis can help you maintain your weight loss goals. It gives you a regular method for being accountable to yourself.
To be accountable you need to weigh yourself 20 times a day.
The context states that you should weigh yourself on a daily basis, the context states that you should weigh yourself 20 times a day and therefore it cannot be correct. 
( z1 need :ARG0 ( z2 you ) :ARG1 ( z3 weigh :frequency 20 :ARG0 z2 :ARG1 z2 :frequency ( z4 rate-entity :ARG3 ( z5 temporal-quantity :quant 1 :unit ( z6 day ) ) ) ) :purpose ( z7 accountable :ARG0 z2 ) )