DOC: extract null_counts_sub for frames only

Author: ivanovmg

pandas/io/formats/info.py

@@ -51,7 +51,11 @@
         only if the DataFrame is smaller than
         ``pandas.options.display.max_info_rows`` and
         ``pandas.options.display.max_info_columns``. A value of True always
-        shows the counts, and False never shows the counts.
+        shows the counts, and False never shows the counts."""
+)
+
+null_counts_sub = dedent(
+    """\
     null_counts : bool, optional
         .. deprecated:: 1.2.0
             Use show_counts instead."""
@@ -157,6 +161,7 @@
     "type_sub": " and columns",
     "max_cols_sub": frame_max_cols_sub,
     "show_counts_sub": show_counts_sub,
+    "null_counts_sub": null_counts_sub,
     "examples_sub": frame_examples_sub,
     "see_also_sub": frame_see_also_sub,
     "version_added_sub": "",
@@ -237,6 +242,7 @@
     "type_sub": "",
     "max_cols_sub": "",
     "show_counts_sub": show_counts_sub,
+    "null_counts_sub": "",
     "examples_sub": series_examples_sub,
     "see_also_sub": series_see_also_sub,
     "version_added_sub": "\n.. versionadded:: 1.4.0\n",
@@ -277,6 +283,7 @@
         memory introspection, a real memory usage calculation is performed
         at the cost of computational resources.
     {show_counts_sub}
+    {null_counts_sub}
 
     Returns
     -------
@@ -508,6 +515,7 @@ def memory_usage_bytes(self) -> int:
         type_sub=" and columns",
         max_cols_sub=frame_max_cols_sub,
         show_counts_sub=show_counts_sub,
+        null_counts_sub=null_counts_sub,
         examples_sub=frame_examples_sub,
         see_also_sub=frame_see_also_sub,
         version_added_sub="",
@@ -548,9 +556,10 @@ def __init__(
         type_sub="",
         max_cols_sub="",
         show_counts_sub=show_counts_sub,
+        null_counts_sub="",
         examples_sub=series_examples_sub,
         see_also_sub=series_see_also_sub,
-        version_added_sub="\n.. versionadded:: 1.2.0\n",
+        version_added_sub="\n.. versionadded:: 1.4.0\n",
     )
     def render(
         self,