One month indisposed. Charge quite a lot (9)

I believe the answer is:

octillion

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'quite a lot' is the definition.
I can't judge whether this definition defines the answer.

'one month indisposed charge' is the wordplay.
'one month' becomes 'oct' (abbreviation for October).
'indisposed' becomes 'ill' (similar in meaning).
'charge' becomes 'ion' (an ion is a charged particle).
'oct'+'ill'+'ion'='OCTILLION'

Can you help me to learn more?

(Another definition for octillion that I've seen is " Large number".)

I've seen this clue in the Sydney Morning Herald.

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