What do these shutter speed increments mean?

Chris is correct.

I would assume these were shot in aperture priority mode or really any other mode where the camera picks a shutter speed. The camera can report and use speeds not normally chosen by the user. You might choose 1/100th of a second or 1/1000th of a second but the camera can choose 1/114.6th of a second. The camera cannot use decimal points so it raises the denominator to 10. Shutter speeds of 1 second or less are given as implied fractions. The camera will say 100, 200, 1000 etc. instead of 1/100, 1/200, 1/1000. Times longer than 1 second usually will be marked like 2" for 2 seconds. Sometimes you will see 2"5 which means 2.5 seconds. It does get confusing when the camera reports a inverse fraction but that is just a limitation of the old fixed displays. No real reason to do that on LCD readouts, but inertia slows change.