moment, occasion = (marrah) مَرّة

Plurals مَرّاتٌ ، مِرَارٌ ، مِرَرٌ ، مَرّ
Associated adverb: once مَرّةً
Associated verb: to pass [time, an affair, a person] مَرّ (يَمُرّ) – مُرُوْرًا ، مَمَرّا

Examples

أَوَلا يَرَوْنَ أَنّهُمْ يُفْتَنُونَ فِي كُلّ عَامٍ مَرّةً أَوْ مَرّتَيْنِ ثُمّ لا يَتُوبُونَ وَلَا هُمْ يَذّكّرُونَ See they not that they are tested once or twice in every year? Still they turn not in repentance, neither pay they heed. – Quran, 9:126

عَنْ أَبِيْ بَكْرَةَ قَالَ سَمِعْتُ النّبِيّ صَلّى الله عَلَيْهِ وَسَلّمَ عَلَى الْمِنْبَرِ وَالْحَسَنُ إِلَى جَنْبِهِ ، يَنْظُرُ إِلَى النّاسِ مَرّةً وَإِلَيْهِ مَرّةً ، وَيَقُولُ : ” اِبْنِيْ هذا سَيّدٌ ، وَلَعَلّ الله أَنْ يُصْلِحَ بِهِ بَيْنَ فِئَتَيْنِ مِنَ الْمُسْلِمِيْنَ On the authority of Abi Bakrah, he said: I heard the Prophet, God’s blessings and salutations upon him, on the minbar, while Hasan was by his side, and he would look at the people one moment, and Hasan the next moment, and say, “This son of mine is a leader, and perhaps God will reconcile, through him, between two Muslim factions” – al-Bukhari

مِصْرِيّونَ يَقْتَرِعُوْنَ لأَوّلِ مَرّةٍ فِي حَيَاتِهِمْ Egyptians cast ballots for the first time in their lives – Al-Jazeera

Did you know…

As can be seen from the above examples, مَرّة is very often used adverbially (and is therefore in the accusative). Common adverbial uses include: مَرّةً once (e.g. ضَرَبْتُهُ مَرّةً I hit him once), مَرّتَيْنِ twice, ثَلاثَ مَرّاتٍ three times, مَرّاتٍ or مِرَارًاseveral or many times, and بِالْمَرّة at once.