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Best Answer: Right now, according to the dictionary, it's still two. Though it could change with the common usage to either hyphenate time-frame or to put it all in one word.
Space of seconds, minutes, hours, days, weeks, months or years with an established beginning date and ending date. It's a unit of measurement used to categorize a length of time. Also called timeframe. I did not know the time period of when the package would ship and when it would arrive at my house and it made me agitated.