Chips, IMO/IME, suck for aging. IF you want something done super fast, that you'll be drinking quickly (under 3 months from first to last bottle poured) then chips can be ok. Get some cubes and do a better job of it. Staves are an even better option. You can also try spirals if you want, or the honeycomb patterned wood.
I typically use 3-4oz of medium toast Hungarian cubes per 6 gallons of beer to age. I also let them sit for at least 4-6 weeks before even looking at the batch.
For time in the bottle, it depends on how fast it carbonates. I wouldn't even THINK about bottling (or kegging) the batch until it was otherwise ready to drink.
If you're concerned about getting too much oak too fast, then start with smaller addition amounts (by weight). You can easily add more to the batch. It can take some time to get too much to mellow with age.
BTW, IF you go with cubes be prepared to have the flavors mutate over time. This is why I don't recommend chips for something going more than 3 months before the final bottle/glass is consumed. After a short amount of time (3-4 months) the oak addition from chips can seriously mutate. I had a batch go from great oak flavor/aroma to vanilla in that much time. 100% disappointment there. Cubes have NOT done this to me.
Also, if you can, see about getting parts from one use barrels. I have some from Maker's Mark that I'm cutting up and using in batches. I have enough to last me a good while too. It doesn't take much work, or tools, to get these into a shape that works.
