Excluding the references and appendices the thesis word count is around 18K(main content). Helping in my thesis with linguistically is sufficient, e.g., correction of grammars, sentence structure(if wrong) and also provide comments where you made a correction and if find some fishy that also you can change.
I am heavily experienced in academic writing, assisting on thesis. I can proofread the document as per the given criteria. I am aware of all common forms of referencing styles.