emr_time(5) # 5 days
emr_time(months = 4) # 4 months
emr_time(2, 4, 1) # 1 year, 4 months and 2 days
year() # 1 year
years(5) # 5 years
month() # 1 month
months(5) # 5 months
day() # 1 day
days(9) # 9 days
week() # 1 week
weeks(2) # 2 weeks
hour() # 1 hour
hours(5) # 5 hours
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