When:
Lookups spiked on November 30, 2011.
Why:
The word was widely used when European finance ministers unlocked frozen bailout money to save Greece from bankruptcy.
For example, according to AFP news, the ministers "agreed to disburse a multi-billion-euro loan" to Greece while the country tries to solve its debt crisis.
Disburse means "to pay out" and is frequently used when payment is made from a public fund. It comes from the French word for "purse."
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Merriam-Webster unabridged