Table 1: Diachronic corpus .

Time period123456
WorkWorkWorkWorkWorkWork

TextsMèngZǐ (Mencius)
Lshìchūnqīu (Mister Lv’s Spring and Autumn Annals)
Shìshuōxīnyǔ (A New Account of the Tales of the World)
Yánshì Jiāxùn Shū (Mister Yan’s Family Motto)
Niǎn Yùguānyīn (Grinding Jade Goddess of Mercy) 
Cuòzhǎncuīníng (Wrongfully Accused of Ying Ning) 
Jiǎntiēhéshang (A letter from a monk)
Shíèrlóu (Twelve Floors)
Wúshēngxì (A Silence Play)
Nàhǎn (Yelling)
Pánghuáng (Hesitating)
Xīndàofózhī (The Buddha Knows Your Mind)
Huíménlǐ (A Wedding present)

Scale (characters)141,86494,72911,220233,43091,70512,980
Selected text scale (characters)10,00010,00010,00010,00010,00010,000
Time spanB.C. 3th-B.C. 2thA.D. 4th-A.D. 5thA.D. 12th-A.D. 13thA.D. 16th-A.D. 17thPre-A.D. 21th
A.D. 20th

narrative texts from Time Period 1 to 4 are from http://www.gushiwen.org/; the narrative texts of Time Period 5 are from http://yuedu.163.com/; the Xinwen Lianbo texts in Time Period 6 are from http://tv.cctv.com/lm/xwlb/.