Seven times:
حَسْبِيَ اللَّهُ لَا إِلَهَ إِلَاّ هُوَ عَلَيْهِ تَوَكَّلْتُ وَهُوَ رَبُّ الْعَرْشِ الْعَظِيْمِ
Transliteration
HasbiyAllahu laa 'ilaaha 'illaa Huwa 'alayhi tawakkaltu wa Huwa Rabbul-'Arshil-'Adheem.
Translation
Allah is Sufficient for me, none has the right to be worshipped except Him, upon Him I rely and He is Lord of the exalted throne.
Note
Abu al-Darda' (RA) said: if anyone says these dua seven times morning and evening, Allah will be sufficient for him against anything which grieves him, whether he is true or false in (repeating) them.
Trust Allah with hasbiyallah dua. Your heart gets peace. Say this seven times morning and evening - Allah removes worries. He handles your needs.
Allah is enough for me. No God but Him. I trust the Lord of the Mighty Throne. Say this in morning and evening adhkar.
Morning and evening azkar time. After Fajr. After Asr or Maghrib. Scholars say these are the times.
Seven times. Hadith says so. Do this morning and evening - Allah takes care of all your worries.
Yes. Very strong. The Prophet ﷺ said it takes away what worries you. Stress and fear go away.
Yes. Learn the hasbiyallah transliteration. Allah sees your heart. Try to memorize - peace and blessings come daily.
Main benefit: Allah handles your problems. Say this masnoon dua seven times - life won't feel too heavy.
Yes. Part of it is in Surah At-Tawbah. Using it as morning and evening dua is sunnah. It builds strong trust in Allah.