Appears 5 times in the Quran.
6:94 وَلَقَدْ جِئْتُمُونَا فُرَٰدَىٰ كَمَا خَلَقْنَٰكُمْ أَوَّلَ مَرَّةٍ وَتَرَكْتُم مَّا خَوَّلْنَٰكُمْ وَرَآءَ ظُهُورِكُمْ وَمَا نَرَىٰ مَعَكُمْ شُفَعَآءَكُمُ ٱلَّذِينَ زَعَمْتُمْ أَنَّهُمْ فِيكُمْ شُرَكَٰٓؤُا۟ لَقَد تَّقَطَّعَ بَيْنَكُمْ وَضَلَّ عَنكُم مَّا كُنتُمْ تَزْعُمُونَ
And certainly you have come to Us alone as We created you at first, and you have left behind your backs the things which We gave you, and We do not see with you your intercessors about whom you asserted that they were (Allah's) associates in respect to you; certainly the ties between you are now cut off and what you asserted is gone from you.
And We will inherit of him what he says, and he shall come to Us alone.
And every one of them will come to Him on the day of resurrection alone.
And Zakariya, when he cried to his Lord: O my Lord leave me not alone; and Thou art the best of inheritors.
34:46 قُلْ إِنَّمَآ أَعِظُكُم بِوَٰحِدَةٍ أَن تَقُومُوا۟ لِلَّهِ مَثْنَىٰ وَفُرَٰدَىٰ ثُمَّ تَتَفَكَّرُوا۟ مَا بِصَاحِبِكُم مِّن جِنَّةٍ إِنْ هُوَ إِلَّا نَذِيرٌ لَّكُم بَيْنَ يَدَىْ عَذَابٍ شَدِيدٍ
Say: I exhort you only to one thing, that rise up for Allah's sake in twos and singly, then ponder: there is no madness in your fellow-citizen; he is only a warner to you before a severe chastisement.