A quick google search reveals that the US launched 2800000 ground attack missions during the Vietnam war, dropping 15000000000 pounds of bombs. That works out to an average of several hundred attacks per day for two decades.
I also encourage you to look at Wikipedia's List of ongoing armed conflicts [1], which lists the Israeli–Palestinian conflict as a "Minor Conflict" given its scale in comparison to the other entries.
Seems a bit over the top to use the Vietnam War as a benchmark for the size of any bombing campaign, unless the benchmark is going for "largest ever by quite a margin".
I also encourage you to look at Wikipedia's List of ongoing armed conflicts [1], which lists the Israeli–Palestinian conflict as a "Minor Conflict" given its scale in comparison to the other entries.
[1]: https://en.wikipedia.org/wiki/List_of_ongoing_armed_conflict...