1. the quality or state of being painstaking; careful and thorough attention to detail in work or effort
Usage: abstract noun derived from the adjective 'painstaking'; formal register

Examples

• The painstakingness of her research was evident in the comprehensive bibliography.
• His painstakingness in crafting each piece made him a respected artisan.
• The project succeeded because of the team's painstakingness and attention to detail.
• She approached the restoration with painstakingness, ensuring no damage to the antique.
• The painstakingness required for this task cannot be overstated.