The phrase "by quantity of" is correct and usable in written English.
You can use it when you need to describe a large amount of something. For example, "This store has a huge selection of books, indicated by quantity of the titles available."
On Sunday, about 100 Foster fans gathered in the memorial's bell tower -- the world's largest carillon system by quantity of bells, the park claims -- for a concert.
b The distribution of aggregates by quantity of NPs per assembly.
Efficacy of the treatment was assessed by quantity of days with headache during the month, quality of life index [2].
The distribution of aggregates by quantity of NPs per assembly for C5F-MTSC (b) and C5F-TSC (d).
As we see in Table 6, ETP is below zero by quantity of (gamma) that are more than 0.5, so we consider ETP as zero in these particular quantity of (gamma).
During investigation on culture conditions of mutant Mut-4 it was observed that the production of bikaverin as well as gibberellic acid was governed by quantity of nitrogen source in the media.
Later these coins were supplemented by quantities of lightweight imitation halfpence, made principally in Birmingham, Eng.
The more liquid a market is, the narrower the spreads and the less prices are moved by quantities of orders.
But the colors are actually smoothed on wet, in shapes determined by quantities of tape, huge tangles of which are visible in the poster announcing the show.
Ten years later, if you measure success by quantities of tourists, boutique hotels, elegant restaurants and a boom in tech startups, New Orleans is thriving.
Good fish comes, as is the way of these joints, disguised by quantities of chilli/ponzu/soy, denaturing it away from its essential raw fishiness.
