breaks_width(width, offset = 0)
# width: Distance between each break. Either a number, or for date/times,
# a single string of the form “n unit”, e.g. “1 month”, “5 days”. 
# Unit can be of one “sec”, “min”, “hour”, “day”, “week”, “month”, “year”.

# offset: Use if you don’t want breaks to start at zero