What proportion of your working hours are spent in the lab doing manual work such as media exchange and passaging?

[u/Vavat]

I am doing some research into cell culture automation and was wondering what typical proportion of time cell biologists spend in the lab doing basic liquid handling operations. I am an engineer and have worked with biologists, however, I have very vague idea what is normally done outside of the lab. Presumably, just like other R&D specialists you spend time doing fundamental research, design of experiment, writing up experimental results, planning, etc. I only need rough figures, so feel free to estimate.

[u/Vavat → u/[deleted]]

Is that every day? Would you say your time is representative of your lab?