Final answer:
There isn't enough information provided to determine the exact duration between the finding of Monty and the news of his disappearance, as the references do not directly address the events involving Ruth, Fred, and Monty.
Step-by-step explanation:
Based on the provided references, there isn't enough direct information to determine the exact time from when Ruth and Fred found Monty to the time they saw the news story of his disappearance. The references given are excerpts from different contexts that do not specifically address the situation involving Ruth, Fred, and Monty. Without clear information linked to the events described in the question, it's not possible to calculate or deduce the duration between finding Monty and recognizing the news story about his disappearance. For an accurate and informative answer, the actual story or text where Ruth, Fred, and Monty are characters would be required to provide context and determine the timeline.