«بِاعْتِبَارِ قِلَّةِ حُرُوفِهِ وَكَثْرَتِهَا»
In respect of the smaller or larger number of letters.
Letter count is one comparison, but cannot override the original meaning, contextual restrictions, and intended effect. Two formulations may concern the same subject while differing in scope or qualifying details.
For example, «سكت الرجل» (“The man remained silent”) is not fully equivalent to «سكت الرجل حين سُئل عن حقِّ غيره» (“The man remained silent when asked about another person’s right”). The longer version adds a material context; the shorter cannot simply be declared an equivalent concise rendering.