Final answer:
The precise number of strikes between 1901 and 1911 isn't given, but the era was marked by increased labor disputes and union activity.
Step-by-step explanation:
Between 1901 and 1911, the number of strikes is not specified in the provided information. To provide a precise figure would require historical labor dispute records of that particular decade. However, it is known that the early 20th century saw a growing trend in labor unrest and numerous strikes, as workers sought better conditions and pay, and unions became more active. The era of industrialization witnessed significant labor-management conflicts, a movement that saw increased strike activity as a method of protest and negotiation for improved labor rights and working conditions.
The text provided refers to the postwar period, specifically citing 3,000 strikes in 1919, which implies a high level of labor activity following World War I. This context offers a picture of the kind of labor disputes that were common in the years before and immediately after the decade in question, setting a historical precedent for the transformative changes in labor relations and the intensification of union initiatives as a response to challenges faced by the working class.