A single-occurrence form or an explicit number can state how many times the action happened.
قَرَأْتُ الرِّسَالَةَ قِرَاءَةً وَاحِدَةً
I read the letter once. قِرَاءَةً وَاحِدَةً counts one reading.
فَنَظَرَ نَظْرَةً فِي النُّجُومِ
Then he cast one look at the stars. The singular occurrence noun نَظْرَةً shows one look.
The learner should identify the count from the meaning of the full phrase.
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Maf'ul Mutlaq: Emphasis, Quality and Number
A single-occurrence form or an explicit number can state how many times the action happened.
قَرَأْتُ الرِّسَالَةَ قِرَاءَةً وَاحِدَةً
I read the letter once. قِرَاءَةً وَاحِدَةً counts one reading.
فَنَظَرَ نَظْرَةً فِي النُّجُومِ
Then he cast one look at the stars. The singular occurrence noun نَظْرَةً shows one look.
The learner should identify the count from the meaning of the full phrase.