small amount

noun
  1. A quantity that is less than average or expected; a limited or minor portion. noun
    She added a small amount of sugar to her coffee.
    Even a small amount of exercise can improve your health.
  2. A minimal or insignificant quantity that may not be sufficient for a particular purpose. noun
    The charity received only a small amount of donations this year.
    He felt a small amount of regret after making the decision.