time_re.py

import re

file_emotion = open('fear1.txt', 'r', encoding='utf-8')
text_emotion = file_emotion.read().lower()
words = text_emotion.split()

def CountFearFeatures_time(text):
    features_time = []
       
    for word in text:
        if re.match ('минут.*', word): 
            features_time.append(word)    
        elif re.match ('секунд.*', word): 
            features_time.append(word)
        elif re.match ('момент*', word): 
            features_time.append(word)       
        elif re.match ('час*', word): 
            features_time.append(word)
        elif re.match ('дн*', word): # дня, дню, днем, дне и проч.
            features_time.append(word)
        elif re.match ('ден*', word): # день + уменьш.: денек, денька, деньку, деньком, деньке и проч.
            features_time.append(word)
            
    return 'Доля лексики с семой "короткий промежуток времени": {0}'.format(len(features_time)/len(words))


print(CountFearFeatures_time(words))