If you keep oncollection, in time you'll have a wealth of data.
只要你注意搜集，久而久之，资料就丰富了。
《新英汉大辞典》
2
C.conduct supervision and inspection oncollection of unemployment insurance premium and payment of unemployment insurance compensation.
对失业保险费的征收和失业保险待遇的支付进行监督检查。
3
6% of the population in Tanzania has access to electricity. 80% of the population lives in rural areas and depend oncollection of wood fuel etc. for energy supply.