Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Chaco Culture' has mentioned 'Rainfall' in the following places:
Occurrence Sentence Text Source
An arid region of high xeric scrubland and desert steppe, the canyon and wider basin average 8 inches (200xc2xa0mm) of rainfall annually; the park averages 9.1 inches (230xc2xa0mm).
Rainfall is most likely between July and September, while May and June are the driest months.
Orographic precipitation, which results from moisture wrung out of storm systems ascending the mountain ranges around Chaco Canyon, is responsible for most of the summer and winter precipitation, and rainfall increases with higher elevation.
[8] The region averages fewer than 150xc2xa0frost-free days per year, and the local climate swings wildly from years of plentiful rainfall to prolonged drought.
Another cluster of great houses lies in Chaco's northern reaches; among the largest is Casa Chiquita ("Small House"), a village built in the 1080s, when, in a period of ample rainfall, Chacoan culture was expanding.