For general understanding and retention of information, reading a text at least twice is generally recommended. The first reading helps in getting an overall understanding of the content, while the second reading allows for more in-depth comprehension and analysis. Some texts, particularly complex or technical ones, may require multiple readings to fully grasp the concepts presented.
If the purpose of reading is to memorize or learn specific information, multiple repetitions and spaced repetitions (reviewing the material at increasing intervals) may be necessary to enhance memory retention.
Additionally, reading a text multiple times can help identify patterns, connections, and nuances that might be missed during a single reading.
Ultimately, the number of times you read a text should be determined based on your individual learning style, the complexity of the material, and the specific goals you have for reading.