difference between "waste" and "wastage"

[Thunu]

Business English Lesson, Advanced Level

ESL/EFL Test #136 "Office Technology Problems", question 6

The delay that is caused by the necessity of waiting for critical responses to emails was another problem that caused time ......... every day.

(a) cartage
(b) garbage
(c) passage
(d) wastage

Business English Lesson, Advanced Level

ESL/EFL Test #136 "Office Technology Problems", answer 6

The delay that is caused by the necessity of waiting for critical responses to emails was another problem that caused time wastage every day.

Correct answer: (d) wastage
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Can you explain the difference between "waste" and "wastage", please? I can't get it clearly

Thank you
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Reach an agreement as ploughing, don't let argument happen at crops.

[Mister Micawber]

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There is no big difference. 'Wastage' is usually the process, while 'waste' is the result.
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Native English teacher at Mister Micawber's