SI prefixes are frequently combined with the word second to denote subdivisions of the second , e.g. , the millisecond -LRB- one thousandth of a second -RRB- , the microsecond -LRB- one millionth of a second -RRB- , and the nanosecond -LRB- one billionth of a second -RRB- .

SI prefixes are frequently combined with the word second to denote subdivisions of the second , e.g. , the millisecond -LRB- one thousandth of a second -RRB- and nanosecond -LRB- one billionth of a second -RRB- .
