diff --git a/docs/images/providers/singleton.png b/docs/images/providers/singleton.png
deleted file mode 100644
index 06e8996f..00000000
Binary files a/docs/images/providers/singleton.png and /dev/null differ
diff --git a/examples/providers/factory.py b/examples/providers/factory.py
index 33453dd3..c83ded02 100644
--- a/examples/providers/factory.py
+++ b/examples/providers/factory.py
@@ -1,4 +1,4 @@
-"""`Factory` providers example."""
+"""`Factory` provider example."""
 
 from dependency_injector import providers
 
diff --git a/examples/providers/factory_delegation.py b/examples/providers/factory_delegation.py
index f6bc02d1..00f3fec5 100644
--- a/examples/providers/factory_delegation.py
+++ b/examples/providers/factory_delegation.py
@@ -1,4 +1,4 @@
-"""`Factory` providers delegation example."""
+"""`Factory` provider delegation example."""
 
 from typing import Callable, List
 
diff --git a/examples/providers/factory_init_injections.py b/examples/providers/factory_init_injections.py
index 682ace80..d720edb6 100644
--- a/examples/providers/factory_init_injections.py
+++ b/examples/providers/factory_init_injections.py
@@ -1,4 +1,4 @@
-"""`Factory` providers init injections example."""
+"""`Factory` provider init injections example."""
 
 from dependency_injector import providers
 
diff --git a/examples/providers/factory_init_injections_underlying.py b/examples/providers/factory_init_injections_underlying.py
index cf49388e..5c9f196f 100644
--- a/examples/providers/factory_init_injections_underlying.py
+++ b/examples/providers/factory_init_injections_underlying.py
@@ -1,4 +1,4 @@
-"""`Factory` providers - building a complex object graph with deep init injections example."""
+"""`Factory` provider - passing injections to the underlying providers example."""
 
 from dependency_injector import providers