```mermaid
graph TD
A[Accept niche/topic description] --> B[Generate search keywords]
B --> C{Search Google with keyword 1}
C -->|Search results 1| D[Save search results 1]
D --> E[Analyze search results 1]
E -->|Key phrases 1| O[Combine key phrases and concepts]
B --> F{Search Google with keyword 2}
F -->|Search results 2| G[Save search results 2]
G --> H[Analyze search results 2]
H -->|Key phrases 2| O
B --> I{Search Google with keyword 3}
I -->|Search results 3| J[Save search results 3]
J --> K[Analyze search results 3]
K -->|Key phrases 3| O
B --> L{Search Google with keyword 4 if applicable}
L -->|Search results 4| M[Save search results 4]
M --> N[Analyze search results 4]
N -->|Key phrases 4| O
B --> P{Search Google with keyword 5 if applicable}
P -->|Search results 5| Q[Save search results 5]
Q --> R[Analyze search results 5]
R -->|Key phrases 5| O
O --> S[Refine key phrases list]
S --> T[Format final list as JSON]
T --> U[Output JSON string]
```