«وَمِنْهُ التَّفْرِيقُ: وَهُوَ إِيقَاعُ تَبَايُنٍ بَيْنَ أَمْرَيْنِ مِنْ نَوْعٍ فِي الْمَدْحِ أَوْ غَيْرِهِ»
“Tafrīq sets two things of a comparable kind apart for praise or another rhetorical purpose.”
The textbook contrasts the gift of a patron with the gift of a rain cloud. Both are gifts, but one is figured as a bag of money and the other as a mere drop of water.
The figure depends on making a meaningful difference inside a shared field, not on listing two unrelated objects.