The Quran was devided by some companions in 7 parts. and the last 7th is known as the “Mufassal”
The mufassal begins from Sarah Qaf until surah An-Nas, and it is devided in 3 sub parts:
1. The long Mufassal: From Surah Qaf until Surah Al-Mursalat
2. The medium Mufassal: From Surah An-Naba until Surah Al-Lail
3. The short Mufassal: From Surah Adh-Dhuha until Surah An-Nas