Hospital grasping cleaning lady’s figures (3,6)

I believe the answer is:

bar charts

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'figures' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps there's an association between them I don't understand?

'hospital grasping cleaning lady's' is the wordplay.
'hospital' becomes 'Barts' (short for St Bartholomew's Hospital).
'grasping' is an insertion indicator (inserted letters are held or grasped).
'cleaning lady' becomes 'char' (synonyms).
'barts' placed around 'char' is 'BAR CHARTS'.

Can you help me to learn more?

(Other definitions for bar charts that I've seen before include "Statistical diagrams" , "Graphs" .)

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