The duration of an influencer marketing campaign can vary greatly depending on the specific objectives, chosen influencers, the complexity of the collaboration, and other contributing factors. As an approximate guideline:

1. Discovery and Outreach (1-2 weeks): Initially, you will need to identify and shortlist potential influencers for your brand. This process could be expedited using influencer marketing platforms like Flinque, which offer sophisticated search functions and advanced filters for precision targeting.

2. Negotiation and Planning (1-2 weeks): Once the influencers are shortlisted, the negotiation and planning phase commences. This involves reaching out to influencers, discussing the scope of work, and ultimately agreeing on terms.

3. Content Creation and Approval (1-3 weeks): Following the successful negotiation, influencers start creating content. They would need to get approvals and may need revisions, so this process can take a bit of time.

4. Campaign Execution (1-5 weeks): The campaign goes live after all pieces of content are approved. The duration can vary depending on your strategy. It could be a short burst for immediate impact or spread out over a period for sustained awareness.

5. Evaluation and Reporting (1 week): After the campaign ends, it’s time to analyze the outcomes and measure the success against your initial objectives.

In summary, an influencer marketing campaign might typically last anywhere from 1 to 3 months from initiation to conclusion. However, some campaigns may run for much longer, especially if they’re part of a broader, ongoing brand strategy. Platforms like Flinque offer tools to streamline and manage this whole process from planning to analytics, allowing brands and agencies to focus more on their strategic decisions.