Performance counter report

Hello. I dont understand the meaning of the terms used in the performance counter report. for example:

--- Quote Start ---

--Performance Counter Report--

Total Time: 1.01876 seconds (50937922 clock-cycles)

+---------------+-----+-----------+---------------+-----------+

| Section | % | Time (sec)| Time (clocks)|Occurrences|

+---------------+-----+-----------+---------------+-----------+

|Sect 01 | 46.4| 0.47311| 23655600| 1|

+---------------+-----+-----------+---------------+-----------+

--- Quote End ---

What is the meaning of:

Total time,

50937922 clock-cycles,

%,

Time(sec),

Time(clocks), and

Occurences?

I mean what do these terms refer to? Please help because I dont really understand. Thanks!