The phrase "long bouts" refers to extended periods of time during which something happens or someone experiences a particular condition or activity. It suggests that the event or condition lasts for a considerable duration. Full definition
The tablet also failed to wake up instantly at times, especially after long bouts of sitting idle. (sammobile.com)
Many life insurance claims come after long bouts with health problems, which are often caused by stress. (efinancial.com)
In other words, chocolate may slow the speed at which the receptor sucks up the serotonin in your brain, which enables you to feel happier for longer bouts of time. (eatthis.com)