import Foundation

var interval: TimeInterval = 200_000_000
let dateComponentsFormatter = DateComponentsFormatter()

dateComponentsFormatter.unitsStyle = .positional
dateComponentsFormatter.string(from: interval)
// "6y 4mo 0w 3d 20:33:20"

dateComponentsFormatter.unitsStyle = .abbreviated
dateComponentsFormatter.string(from: interval)
// "6y 4mo 3d 20h 33m 20s"

dateComponentsFormatter.unitsStyle = .short
dateComponentsFormatter.string(from: interval)
// "6 yrs, 4 mths, 3 days, 20 hr, 33 min, 20 sec"

dateComponentsFormatter.unitsStyle = .full
dateComponentsFormatter.string(from: interval)
// "6 years, 4 months, 3 days, 20 hours, 33 minutes, 20 seconds"

dateComponentsFormatter.unitsStyle = .spellOut
dateComponentsFormatter.string(from: interval)
// "six years, four months, three days, twenty hours, thirty-three minutes, twenty seconds"

dateComponentsFormatter.unitsStyle = .brief
dateComponentsFormatter.string(from: interval)
// "6yrs 4mths 3days 20hr 33min 20sec"