Library usage counting/finding

[visual_Zenith5FAA]

Hello!

I have a few objects where they are showing multiple uses in the library:

it is supposed t be on slide 18. but not 19 or 35. 

however, I can not find it, it is not in my timeline or in the advanced actions I have in my slide. 

Anyone have any ideas on how I can find it and delete to help my file size?

[visual_Zenith5FAA]

dfound it on another thread. it's becuase I copied from another project had to copy to a new blank project.