On the whole, کتب الاربعه or Kotob-al-Arba’ah (four books) are deemed as the name of four Shiite books which is remarked as the most authentic book(s) of Shia. (even these can be investigated as an authentic source in order to referring to, too) which consist of:

1. الکافى
2. من لا یحضره الفقیه
3. تهذیب الاحکام
4. الإستبصار فیما اختلف من الأخبار

I was wondering if there is any statistics about their numbers separately and totally. (about the number of hadiths)

On the whole, کتب الاربعه or Kotob-al-Arba’ah (four books) are deemed as the name of four Shiite books which is remarked as the most authentic book(s) of Shia. (Even these can be investigated as an authentic source in order to referring to, too) which consist of:

1. الکافى
2. من لا یحضره الفقیه
3. تهذیب الاحکام
4. الإستبصار فیما اختلف من الأخبار

I was wondering if there is any statistics about their numbers separately and totally. (About the number of hadiths)