constantly

"The invariable part of my morning routine is drinking coffee before starting my work. "

"The liftoff will occur in exactly twelve seconds."

"I have been faithfully married for the past twenty years."

"The river continuously flows to the sea, it will never pause to let us cross on dry land."

"Her steadfastness in supporting her friend through a difficult illness was truly admirable. "

"Even when things got difficult, her steadfast dedication to her studies helped her graduate with honors. "

"The frequency of bus service has been improved from one every 15 to one every 12 minutes."

"The teacher explained the lesson thoroughly throughout the entire class period. "

"The small girl persistently asked her father to buy her the doll."

""Once the contract is signed, the agreed-upon price becomes unchangeable." "

"When faced with a difficult math problem, I often recur to my older sister for help. "

"Can you demonstrate the new tools for us?"