Explanation

Muhammad is the 47th surah of the Quran with 38 verses 

The name "Muhammad" is mentioned four times in the Quran, and the name "Ahmad"  is mentioned one time.

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Name “Muhammad”, four times mentioned in the whole Quran.

1. Aal Imraan 3: 144;
2. Al-Ahzaab 33: 40;
3. Muhammad 47: 2; and
4. Al-Fatah 48: 29

Name “Ahmed”, one time mentioned in the whole Quran.

1. Al-Saff 61: 6.