How to Use "accumulation" with Example Sentences

1. The steep accumulation may not be obvious to investors .
2. Painstaking accumulation of technological skill eventually enabled innovative multinational firms to emerge .
3. This accumulation must be viewed as a huge export subsidy .
4. Was there a deep strategy behind this vast accumulation of low-yielding assets ?
5. The coronary artery providing heart with blood may cause heart-disease because of the accumulation of fat .