The word(s) "brief" appears 3 time(s) in 3 verse(s) in Quran in Muhammad Pickthal translation.

(1) It is but a brief comfort. And afterward their habitation will be hell, an ill abode.

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #197)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) Allah enlargeth livelihood for whom He will, and straiteneth (it for whom He will); and they rejoice in the life of the world, whereas the life of the world is but brief comfort as compared with the Hereafter.

(سورة الرعد, Ar-Ra'd, Chapter #13, Verse #26)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(3) A brief enjoyment (will be theirs); and theirs a painful doom.

(سورة النحل, An-Nahl, Chapter #16, Verse #117)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)