Answer:
repeatedly, is
Step-by-step explanation
Cartel is a group of manufacturers and business houses with a purpose of keeping high prices of products. This allows the cartels to restrict competition in the market and hold complete sway over business via cheating. Cartels can run for a long time if various firms continue to indulge in corrupt practices secretly. No doubt, cartels are against the business ethics and hence it involves credible threats due to cheating.